Merge branch 'maint-1.2.0' of github.com:sfilippone/amg4psblas into maint-1.2.0

.VERSION

@@ -1,5 +1,6 @@
 $Format:%d%n%n$
-1.2.1
+# Fall back version, probably last release:
+1.2.0
 
 # AMG4PSBLAS version file.
 #

CMakeLists.txt

@@ -13,10 +13,15 @@ endif()
 
 
 # Check for the installation path for psblas
-message(STATUS "psblas directory is ${PSBLAS_INSTALL_DIR};")
+#if(NOT DEFINED PSBLAS_INSTALL_DIR)
+#    message(FATAL_ERROR "Please specify the path to the psblas installation directory using -DPSBLAS_INSTALL_DIR=<path>")
+#endif()
+message(STATUS "psblas directory is ${PSBLAS_INSTALL_DIR};;")
+
 
 message(STATUS "PSBLAS DIRECTORY INC ${INCDIR}; MOD ${MODDIR}; LIB ${LIBDIR};")
 
+
 #set(CMAKE_CXX_STANDARD 17) # Set cxx standard for the c++ part of the library
 
 
@@ -26,7 +31,7 @@ find_package(psblas REQUIRED PATHS ${PSBLAS_INSTALL_DIR})
 if(NOT psblas_FOUND)
     message(FATAL_ERROR "PSBLAS not found!")
 else()
-    message(STATUS "Found PSBLAS: ${PSBLAS_LIBRARIES}")
+    message(STATUS "Found PSBLAS: ${psblas_LIBRARIES}")
 endif()
 
 if(CMAKE_BUILD_TYPE STREQUAL "Debug")
@@ -37,9 +42,9 @@ if(CMAKE_BUILD_TYPE STREQUAL "Debug")
     message(STATUS "Fortran and CXX debug flags added: -g")
 endif()
 
-string(APPEND CMAKE_Fortran_FLAGS " -O2")
-string(APPEND CMAKE_CXX_FLAGS " -O2")
-message(STATUS "Fortran and CXX optimization flags added: -O2")
+    string(APPEND CMAKE_Fortran_FLAGS " -O2")
+    string(APPEND CMAKE_CXX_FLAGS " -O2")
+    message(STATUS "Fortran and CXX optimization flags added: -O2")
 
 
 
@@ -425,9 +430,7 @@ target_include_directories(amgcbind PUBLIC ${INCDIR} ${MODDIR})
 target_link_libraries(amgcbind
   #PUBLIC ${LAPACK_LINKER_FLAGS} ${LAPACK_LIBRARIES} ${LAPACK95_LIBRARIES}
   #PUBLIC ${BLAS_LINKER_FLAGS} ${BLAS_LIBRARIES} ${BLAS95_LIBRARIES}
-  PUBLIC amgprec psblas::util psblas::linsolve psblas::prec
-  psblas::ext psblas::cbind psblas::base)
-  #TODO  check actual libraries needed
+  PUBLIC amgprec psblas::util psblas::linsolve psblas::prec psblas::ext psblas::cbind psblas::base)  #TODO  check actual libraries needed
 
 
 

LICENSE

@@ -7,7 +7,7 @@
     (C) Copyright 2025  Salvatore Filippone
     (C) Copyright 2025  Pasqua D'Ambra
     (C) Copyright 2025  Fabio Durastante
-
+   
     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions
     are met:

Make.inc.in

@@ -71,7 +71,7 @@ EXTRALIBS=@EXTRA_LIBS@
 
 #
 AMGCDEFINES=$(SLUFLAGS) $(UMFFLAGS) $(SLUDISTFLAGS)
-#$(PSBCDEFINES) $(MUMPSFLAGS) 
+#$(PSBCDEFINES) $(MUMPSFLAGS)
 CDEFINES=$(AMGCDEFINES)
 AMGFDEFINES=@AMGFDEFINES@ $(PSBFDEFINES)
 FDEFINES=$(AMGFDEFINES)

Makefile

@@ -19,7 +19,7 @@ libdir:
 amgobjs: mods
 	cd amgprec && $(MAKE) objs
 
-cbnd: amgobjs
+cbnd: mods
 	cd cbind && $(MAKE)  objs
 
 install: all

amgprec/Makefile

@@ -58,8 +58,7 @@ MODOBJS=amg_base_prec_type.o amg_prec_type.o  amg_prec_mod.o \
 	$(SMODOBJS) $(DMODOBJS) $(CMODOBJS) $(ZMODOBJS)
 
 
-LOCAL_MODS=$(MODOBJS:.o=$(.mod)) amg_c_l1_diag_solver$(.mod) amg_s_l1_diag_solver$(.mod) \
-	amg_d_l1_diag_solver$(.mod) amg_z_l1_diag_solver$(.mod)
+LOCAL_MODS=$(MODOBJS:.o=$(.mod))
 LIBNAME=libamg_prec.a
 
 all: mods  objs impld
@@ -71,7 +70,7 @@ objs: mods impld
 impld: mods
 	cd impl && $(MAKE) 
 
-lib: objs
+lib: mods impld
 	cd impl && $(MAKE) lib
 	$(AR) $(HERE)/$(LIBNAME) $(MODOBJS)
 	$(RANLIB) $(HERE)/$(LIBNAME)
@@ -80,7 +79,7 @@ lib: objs
 
 $(MODOBJS): $(PSBLAS_MODDIR)/$(PSBBASEMODNAME)$(.mod)
 
-amg_base_prec_type.o: amg_config.h
+#amg_base_prec_type.o: amg_const.h
 amg_s_prec_type.o amg_d_prec_type.o amg_c_prec_type.o amg_z_prec_type.o	: amg_base_prec_type.o
 amg_prec_type.o: amg_s_prec_type.o amg_d_prec_type.o amg_c_prec_type.o amg_z_prec_type.o
 amg_prec_mod.o: amg_prec_type.o amg_s_prec_mod.o amg_d_prec_mod.o amg_c_prec_mod.o amg_z_prec_mod.o

amgprec/amg_base_prec_type.F90

@@ -84,7 +84,7 @@ module amg_base_prec_type
   character(len=*), parameter   :: amg_version_string_ = "1.2.0"
   integer(psb_ipk_), parameter  :: amg_version_major_  = 1
   integer(psb_ipk_), parameter  :: amg_version_minor_  = 2
-  integer(psb_ipk_), parameter  :: amg_patchlevel_     = 1
+  integer(psb_ipk_), parameter  :: amg_patchlevel_     = 0
 
   type amg_ml_parms
     integer(psb_ipk_) :: sweeps_pre, sweeps_post

amgprec/amg_c_ainv_solver.F90

@@ -103,7 +103,7 @@ module amg_c_ainv_solver
       Implicit None
 
       ! Arguments
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_c_ainv_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -225,7 +225,7 @@ module amg_c_ainv_solver
       import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
            & psb_d_vect_type, psb_c_base_vect_type, psb_spk_, psb_ipk_
       implicit none
-      type(psb_cspmat_type), intent(inout), target  :: a
+      type(psb_cspmat_type), intent(in), target   :: a
       integer(psb_ipk_), intent(in)               :: fillin,alg
       real(psb_spk_), intent(in)                  :: thresh
       type(psb_cspmat_type), intent(inout)        :: wmat, zmat

amgprec/amg_c_as_smoother.f90

@@ -230,7 +230,7 @@ module amg_c_as_smoother
            & psb_desc_type, psb_c_base_sparse_mat, psb_ipk_,&
            & psb_i_base_vect_type
       implicit none 
-      type(psb_cspmat_type), intent(inout), target     :: a
+      type(psb_cspmat_type), intent(in), target        :: a
       Type(psb_desc_type), Intent(inout)                 :: desc_a 
       class(amg_c_as_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                     :: info

amgprec/amg_c_base_smoother_mod.f90

@@ -237,7 +237,7 @@ module amg_c_base_smoother_mod
            & psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
            & amg_c_base_smoother_type, psb_ipk_, psb_i_base_vect_type
       ! Arguments
-      type(psb_cspmat_type), intent(inout), target  :: a
+      type(psb_cspmat_type), intent(in), target     :: a
       Type(psb_desc_type), Intent(inout)              :: desc_a 
       class(amg_c_base_smoother_type), intent(inout) :: sm 
       integer(psb_ipk_), intent(out)                  :: info

amgprec/amg_c_base_solver_mod.f90

@@ -170,7 +170,7 @@ module amg_c_base_solver_mod
       Implicit None
       
       ! Arguments
-      type(psb_cspmat_type), intent(inout), target          :: a
+      type(psb_cspmat_type), intent(in), target             :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_c_base_solver_type), intent(inout)          :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/amg_c_diag_solver.f90

@@ -119,7 +119,7 @@ module amg_c_diag_solver
       import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
            & psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
            & amg_c_diag_solver_type, psb_ipk_, psb_i_base_vect_type      
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_c_diag_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                        :: info
@@ -331,7 +331,7 @@ module amg_c_l1_diag_solver
       import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
            & psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
            & amg_c_l1_diag_solver_type, psb_ipk_, psb_i_base_vect_type      
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_c_l1_diag_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/amg_c_gs_solver.f90

@@ -181,7 +181,7 @@ module amg_c_gs_solver
            & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_c_gs_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -195,7 +195,7 @@ module amg_c_gs_solver
            & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_c_bwgs_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_c_id_solver.f90

@@ -123,7 +123,7 @@ contains
     Implicit None
 
     ! Arguments
-    type(psb_cspmat_type), intent(inout), target        :: a
+    type(psb_cspmat_type), intent(in), target           :: a
     Type(psb_desc_type), Intent(inout)                  :: desc_a 
     class(amg_c_id_solver_type), intent(inout)          :: sv
     integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_c_ilu_solver.f90

@@ -144,7 +144,7 @@ module amg_c_ilu_solver
            & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_c_ilu_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_c_inner_mod.f90

@@ -56,7 +56,7 @@ module amg_c_inner_mod
            & psb_spk_, psb_c_base_sparse_mat, psb_c_base_vect_type, psb_ipk_
       import :: amg_cprec_type
       implicit none
-      type(psb_cspmat_type), intent(inout), target       :: a
+      type(psb_cspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       type(amg_cprec_type), intent(inout), target        :: prec
       integer(psb_ipk_), intent(out)                       :: info

amgprec/amg_c_invk_solver.f90

@@ -94,7 +94,7 @@ module amg_c_invk_solver
       Implicit None
 
       ! Arguments
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_c_invk_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_c_invt_solver.f90

@@ -94,7 +94,7 @@ module amg_c_invt_solver
       Implicit None
 
       ! Arguments
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_c_invt_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_c_jac_smoother.f90

@@ -151,7 +151,7 @@ module amg_c_jac_smoother
       import :: psb_desc_type, amg_c_jac_smoother_type, psb_c_vect_type, psb_spk_, &
            & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_c_jac_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info
@@ -274,7 +274,7 @@ module amg_c_jac_smoother
       import :: psb_desc_type, amg_c_l1_jac_smoother_type, psb_c_vect_type, &
            & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_c_l1_jac_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_c_jac_solver.f90

@@ -143,7 +143,7 @@ module amg_c_jac_solver
            & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_c_jac_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -160,7 +160,7 @@ module amg_c_jac_solver
            & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_c_l1_jac_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_c_krm_solver.f90

@@ -174,7 +174,7 @@ module amg_c_krm_solver
            & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_c_krm_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_c_mumps_solver.F90

@@ -163,7 +163,7 @@ module amg_c_mumps_solver
       Implicit None
 
       ! Arguments
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_c_mumps_solver_type), intent(inout)       :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_c_prec_type.f90

@@ -311,7 +311,7 @@ module amg_c_prec_type
            & psb_c_base_sparse_mat, psb_c_base_vect_type, &
            & psb_i_base_vect_type, amg_cprec_type, psb_ipk_
       implicit none
-      type(psb_cspmat_type), intent(inout), target       :: a
+      type(psb_cspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       class(amg_cprec_type), intent(inout), target       :: prec
       integer(psb_ipk_), intent(out)                       :: info
@@ -323,15 +323,14 @@ module amg_c_prec_type
   end interface amg_precbld
 
   interface amg_hierarchy_bld
-    subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
+    subroutine amg_c_hierarchy_bld(a,desc_a,prec,info)
       import :: psb_cspmat_type, psb_desc_type, psb_spk_, &
            & amg_cprec_type, psb_ipk_
       implicit none
-      type(psb_cspmat_type), intent(inout), target       :: a
+      type(psb_cspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       class(amg_cprec_type), intent(inout), target        :: prec
       integer(psb_ipk_), intent(out)                       :: info
-      logical, intent(in), optional                        :: cpymat
       !      character, intent(in),optional             :: upd
     end subroutine amg_c_hierarchy_bld
   end interface amg_hierarchy_bld
@@ -636,11 +635,6 @@ contains
     if (allocated(prec%precv)) then
       do i=1,size(prec%precv)
         call prec%precv(i)%free(info)
-        if (psb_errstatus_fatal()) then
-          info=psb_err_internal_error_
-          call psb_errpush(info,name)
-          goto 9999
-        end if
       end do
       deallocate(prec%precv,stat=info)
     end if
@@ -1012,7 +1006,7 @@ contains
     integer(psb_ipk_), intent(out)        :: info
     class(psb_c_base_vect_type), intent(in), optional  :: vmold
     !
-    ! In AMG the DESC optional argument is ignored, since
+    ! In MLD the DESC optional argument is ignored, since
     ! the necessary info is contained in the various entries of the
     ! PRECV component.
     type(psb_desc_type), intent(in), optional  :: desc

amgprec/amg_c_slu_solver.F90

@@ -124,7 +124,7 @@ module amg_c_slu_solver
       Implicit None
 
       ! Arguments
-      type(psb_cspmat_type), intent(inout), target        :: a
+      type(psb_cspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_c_slu_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_ainv_solver.F90

@@ -103,7 +103,7 @@ module amg_d_ainv_solver
       Implicit None
 
       ! Arguments
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_d_ainv_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -225,7 +225,7 @@ module amg_d_ainv_solver
       import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
            & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, psb_ipk_
       implicit none
-      type(psb_dspmat_type), intent(inout), target  :: a
+      type(psb_dspmat_type), intent(in), target   :: a
       integer(psb_ipk_), intent(in)               :: fillin,alg
       real(psb_dpk_), intent(in)                  :: thresh
       type(psb_dspmat_type), intent(inout)        :: wmat, zmat

amgprec/amg_d_as_smoother.f90

@@ -230,7 +230,7 @@ module amg_d_as_smoother
            & psb_desc_type, psb_d_base_sparse_mat, psb_ipk_,&
            & psb_i_base_vect_type
       implicit none 
-      type(psb_dspmat_type), intent(inout), target     :: a
+      type(psb_dspmat_type), intent(in), target        :: a
       Type(psb_desc_type), Intent(inout)                 :: desc_a 
       class(amg_d_as_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                     :: info

amgprec/amg_d_base_smoother_mod.f90

@@ -237,7 +237,7 @@ module amg_d_base_smoother_mod
            & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, &
            & amg_d_base_smoother_type, psb_ipk_, psb_i_base_vect_type
       ! Arguments
-      type(psb_dspmat_type), intent(inout), target  :: a
+      type(psb_dspmat_type), intent(in), target     :: a
       Type(psb_desc_type), Intent(inout)              :: desc_a 
       class(amg_d_base_smoother_type), intent(inout) :: sm 
       integer(psb_ipk_), intent(out)                  :: info

amgprec/amg_d_base_solver_mod.f90

@@ -170,7 +170,7 @@ module amg_d_base_solver_mod
       Implicit None
       
       ! Arguments
-      type(psb_dspmat_type), intent(inout), target          :: a
+      type(psb_dspmat_type), intent(in), target             :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_d_base_solver_type), intent(inout)          :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/amg_d_diag_solver.f90

@@ -119,7 +119,7 @@ module amg_d_diag_solver
       import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
            & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, &
            & amg_d_diag_solver_type, psb_ipk_, psb_i_base_vect_type      
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_d_diag_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                        :: info
@@ -331,7 +331,7 @@ module amg_d_l1_diag_solver
       import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
            & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, &
            & amg_d_l1_diag_solver_type, psb_ipk_, psb_i_base_vect_type      
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_d_l1_diag_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/amg_d_gs_solver.f90

@@ -181,7 +181,7 @@ module amg_d_gs_solver
            & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_d_gs_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -195,7 +195,7 @@ module amg_d_gs_solver
            & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_d_bwgs_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_id_solver.f90

@@ -123,7 +123,7 @@ contains
     Implicit None
 
     ! Arguments
-    type(psb_dspmat_type), intent(inout), target        :: a
+    type(psb_dspmat_type), intent(in), target           :: a
     Type(psb_desc_type), Intent(inout)                  :: desc_a 
     class(amg_d_id_solver_type), intent(inout)          :: sv
     integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_ilu_solver.f90

@@ -144,7 +144,7 @@ module amg_d_ilu_solver
            & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_d_ilu_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_inner_mod.f90

@@ -56,7 +56,7 @@ module amg_d_inner_mod
            & psb_dpk_, psb_d_base_sparse_mat, psb_d_base_vect_type, psb_ipk_
       import :: amg_dprec_type
       implicit none
-      type(psb_dspmat_type), intent(inout), target       :: a
+      type(psb_dspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       type(amg_dprec_type), intent(inout), target        :: prec
       integer(psb_ipk_), intent(out)                       :: info

amgprec/amg_d_invk_solver.f90

@@ -94,7 +94,7 @@ module amg_d_invk_solver
       Implicit None
 
       ! Arguments
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_d_invk_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_invt_solver.f90

@@ -94,7 +94,7 @@ module amg_d_invt_solver
       Implicit None
 
       ! Arguments
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_d_invt_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_jac_smoother.f90

@@ -151,7 +151,7 @@ module amg_d_jac_smoother
       import :: psb_desc_type, amg_d_jac_smoother_type, psb_d_vect_type, psb_dpk_, &
            & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_d_jac_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info
@@ -274,7 +274,7 @@ module amg_d_jac_smoother
       import :: psb_desc_type, amg_d_l1_jac_smoother_type, psb_d_vect_type, &
            & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_d_l1_jac_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_jac_solver.f90

@@ -143,7 +143,7 @@ module amg_d_jac_solver
            & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_d_jac_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -160,7 +160,7 @@ module amg_d_jac_solver
            & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_d_l1_jac_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_krm_solver.f90

@@ -174,7 +174,7 @@ module amg_d_krm_solver
            & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_d_krm_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_mumps_solver.F90

@@ -163,7 +163,7 @@ module amg_d_mumps_solver
       Implicit None
 
       ! Arguments
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_d_mumps_solver_type), intent(inout)       :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_poly_smoother.f90

@@ -140,7 +140,7 @@ module amg_d_poly_smoother
       import :: psb_desc_type, amg_d_poly_smoother_type, psb_d_vect_type, psb_dpk_, &
            & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_d_poly_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_prec_type.f90

@@ -311,7 +311,7 @@ module amg_d_prec_type
            & psb_d_base_sparse_mat, psb_d_base_vect_type, &
            & psb_i_base_vect_type, amg_dprec_type, psb_ipk_
       implicit none
-      type(psb_dspmat_type), intent(inout), target       :: a
+      type(psb_dspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       class(amg_dprec_type), intent(inout), target       :: prec
       integer(psb_ipk_), intent(out)                       :: info
@@ -323,15 +323,14 @@ module amg_d_prec_type
   end interface amg_precbld
 
   interface amg_hierarchy_bld
-    subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
+    subroutine amg_d_hierarchy_bld(a,desc_a,prec,info)
       import :: psb_dspmat_type, psb_desc_type, psb_dpk_, &
            & amg_dprec_type, psb_ipk_
       implicit none
-      type(psb_dspmat_type), intent(inout), target       :: a
+      type(psb_dspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       class(amg_dprec_type), intent(inout), target        :: prec
       integer(psb_ipk_), intent(out)                       :: info
-      logical, intent(in), optional                        :: cpymat
       !      character, intent(in),optional             :: upd
     end subroutine amg_d_hierarchy_bld
   end interface amg_hierarchy_bld
@@ -636,11 +635,6 @@ contains
     if (allocated(prec%precv)) then
       do i=1,size(prec%precv)
         call prec%precv(i)%free(info)
-        if (psb_errstatus_fatal()) then
-          info=psb_err_internal_error_
-          call psb_errpush(info,name)
-          goto 9999
-        end if
       end do
       deallocate(prec%precv,stat=info)
     end if
@@ -1012,7 +1006,7 @@ contains
     integer(psb_ipk_), intent(out)        :: info
     class(psb_d_base_vect_type), intent(in), optional  :: vmold
     !
-    ! In AMG the DESC optional argument is ignored, since
+    ! In MLD the DESC optional argument is ignored, since
     ! the necessary info is contained in the various entries of the
     ! PRECV component.
     type(psb_desc_type), intent(in), optional  :: desc

amgprec/amg_d_slu_solver.F90

@@ -124,7 +124,7 @@ module amg_d_slu_solver
       Implicit None
 
       ! Arguments
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_d_slu_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_d_sludist_solver.F90

@@ -259,7 +259,7 @@ contains
     Implicit None
 
     ! Arguments
-    type(psb_dspmat_type), intent(inout), target        :: a
+    type(psb_dspmat_type), intent(in), target           :: a
     Type(psb_desc_type), Intent(inout)                  :: desc_a 
     class(amg_d_sludist_solver_type), intent(inout)     :: sv
     integer, intent(out)                                :: info

amgprec/amg_d_umf_solver.F90

@@ -163,7 +163,7 @@ module amg_d_umf_solver
       Implicit None
       
       ! Arguments
-      type(psb_dspmat_type), intent(inout), target        :: a
+      type(psb_dspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_d_umf_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/amg_s_ainv_solver.F90

@@ -103,7 +103,7 @@ module amg_s_ainv_solver
       Implicit None
 
       ! Arguments
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_s_ainv_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -225,7 +225,7 @@ module amg_s_ainv_solver
       import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
            & psb_d_vect_type, psb_s_base_vect_type, psb_spk_, psb_ipk_
       implicit none
-      type(psb_sspmat_type), intent(inout), target  :: a
+      type(psb_sspmat_type), intent(in), target   :: a
       integer(psb_ipk_), intent(in)               :: fillin,alg
       real(psb_spk_), intent(in)                  :: thresh
       type(psb_sspmat_type), intent(inout)        :: wmat, zmat

amgprec/amg_s_as_smoother.f90

@@ -230,7 +230,7 @@ module amg_s_as_smoother
            & psb_desc_type, psb_s_base_sparse_mat, psb_ipk_,&
            & psb_i_base_vect_type
       implicit none 
-      type(psb_sspmat_type), intent(inout), target     :: a
+      type(psb_sspmat_type), intent(in), target        :: a
       Type(psb_desc_type), Intent(inout)                 :: desc_a 
       class(amg_s_as_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                     :: info

amgprec/amg_s_base_smoother_mod.f90

@@ -237,7 +237,7 @@ module amg_s_base_smoother_mod
            & psb_s_vect_type, psb_s_base_vect_type, psb_spk_, &
            & amg_s_base_smoother_type, psb_ipk_, psb_i_base_vect_type
       ! Arguments
-      type(psb_sspmat_type), intent(inout), target  :: a
+      type(psb_sspmat_type), intent(in), target     :: a
       Type(psb_desc_type), Intent(inout)              :: desc_a 
       class(amg_s_base_smoother_type), intent(inout) :: sm 
       integer(psb_ipk_), intent(out)                  :: info

amgprec/amg_s_base_solver_mod.f90

@@ -170,7 +170,7 @@ module amg_s_base_solver_mod
       Implicit None
       
       ! Arguments
-      type(psb_sspmat_type), intent(inout), target          :: a
+      type(psb_sspmat_type), intent(in), target             :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_s_base_solver_type), intent(inout)          :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/amg_s_diag_solver.f90

@@ -119,7 +119,7 @@ module amg_s_diag_solver
       import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
            & psb_s_vect_type, psb_s_base_vect_type, psb_spk_, &
            & amg_s_diag_solver_type, psb_ipk_, psb_i_base_vect_type      
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_s_diag_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                        :: info
@@ -331,7 +331,7 @@ module amg_s_l1_diag_solver
       import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
            & psb_s_vect_type, psb_s_base_vect_type, psb_spk_, &
            & amg_s_l1_diag_solver_type, psb_ipk_, psb_i_base_vect_type      
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_s_l1_diag_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/amg_s_gs_solver.f90

@@ -181,7 +181,7 @@ module amg_s_gs_solver
            & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_s_gs_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -195,7 +195,7 @@ module amg_s_gs_solver
            & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_s_bwgs_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_id_solver.f90

@@ -123,7 +123,7 @@ contains
     Implicit None
 
     ! Arguments
-    type(psb_sspmat_type), intent(inout), target        :: a
+    type(psb_sspmat_type), intent(in), target           :: a
     Type(psb_desc_type), Intent(inout)                  :: desc_a 
     class(amg_s_id_solver_type), intent(inout)          :: sv
     integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_ilu_solver.f90

@@ -144,7 +144,7 @@ module amg_s_ilu_solver
            & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_s_ilu_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_inner_mod.f90

@@ -56,7 +56,7 @@ module amg_s_inner_mod
            & psb_spk_, psb_s_base_sparse_mat, psb_s_base_vect_type, psb_ipk_
       import :: amg_sprec_type
       implicit none
-      type(psb_sspmat_type), intent(inout), target       :: a
+      type(psb_sspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       type(amg_sprec_type), intent(inout), target        :: prec
       integer(psb_ipk_), intent(out)                       :: info

amgprec/amg_s_invk_solver.f90

@@ -94,7 +94,7 @@ module amg_s_invk_solver
       Implicit None
 
       ! Arguments
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_s_invk_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_invt_solver.f90

@@ -94,7 +94,7 @@ module amg_s_invt_solver
       Implicit None
 
       ! Arguments
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_s_invt_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_jac_smoother.f90

@@ -151,7 +151,7 @@ module amg_s_jac_smoother
       import :: psb_desc_type, amg_s_jac_smoother_type, psb_s_vect_type, psb_spk_, &
            & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_s_jac_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info
@@ -274,7 +274,7 @@ module amg_s_jac_smoother
       import :: psb_desc_type, amg_s_l1_jac_smoother_type, psb_s_vect_type, &
            & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_s_l1_jac_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_jac_solver.f90

@@ -143,7 +143,7 @@ module amg_s_jac_solver
            & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_s_jac_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -160,7 +160,7 @@ module amg_s_jac_solver
            & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_s_l1_jac_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_krm_solver.f90

@@ -174,7 +174,7 @@ module amg_s_krm_solver
            & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_s_krm_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_mumps_solver.F90

@@ -163,7 +163,7 @@ module amg_s_mumps_solver
       Implicit None
 
       ! Arguments
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_s_mumps_solver_type), intent(inout)       :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_poly_smoother.f90

@@ -140,7 +140,7 @@ module amg_s_poly_smoother
       import :: psb_desc_type, amg_s_poly_smoother_type, psb_s_vect_type, psb_spk_, &
            & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_s_poly_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_s_prec_type.f90

@@ -311,7 +311,7 @@ module amg_s_prec_type
            & psb_s_base_sparse_mat, psb_s_base_vect_type, &
            & psb_i_base_vect_type, amg_sprec_type, psb_ipk_
       implicit none
-      type(psb_sspmat_type), intent(inout), target       :: a
+      type(psb_sspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       class(amg_sprec_type), intent(inout), target       :: prec
       integer(psb_ipk_), intent(out)                       :: info
@@ -323,15 +323,14 @@ module amg_s_prec_type
   end interface amg_precbld
 
   interface amg_hierarchy_bld
-    subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
+    subroutine amg_s_hierarchy_bld(a,desc_a,prec,info)
       import :: psb_sspmat_type, psb_desc_type, psb_spk_, &
            & amg_sprec_type, psb_ipk_
       implicit none
-      type(psb_sspmat_type), intent(inout), target       :: a
+      type(psb_sspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       class(amg_sprec_type), intent(inout), target        :: prec
       integer(psb_ipk_), intent(out)                       :: info
-      logical, intent(in), optional                        :: cpymat
       !      character, intent(in),optional             :: upd
     end subroutine amg_s_hierarchy_bld
   end interface amg_hierarchy_bld
@@ -636,11 +635,6 @@ contains
     if (allocated(prec%precv)) then
       do i=1,size(prec%precv)
         call prec%precv(i)%free(info)
-        if (psb_errstatus_fatal()) then
-          info=psb_err_internal_error_
-          call psb_errpush(info,name)
-          goto 9999
-        end if
       end do
       deallocate(prec%precv,stat=info)
     end if
@@ -1012,7 +1006,7 @@ contains
     integer(psb_ipk_), intent(out)        :: info
     class(psb_s_base_vect_type), intent(in), optional  :: vmold
     !
-    ! In AMG the DESC optional argument is ignored, since
+    ! In MLD the DESC optional argument is ignored, since
     ! the necessary info is contained in the various entries of the
     ! PRECV component.
     type(psb_desc_type), intent(in), optional  :: desc

amgprec/amg_s_slu_solver.F90

@@ -124,7 +124,7 @@ module amg_s_slu_solver
       Implicit None
 
       ! Arguments
-      type(psb_sspmat_type), intent(inout), target        :: a
+      type(psb_sspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_s_slu_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_ainv_solver.F90

@@ -103,7 +103,7 @@ module amg_z_ainv_solver
       Implicit None
 
       ! Arguments
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_z_ainv_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -225,7 +225,7 @@ module amg_z_ainv_solver
       import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
            & psb_d_vect_type, psb_z_base_vect_type, psb_dpk_, psb_ipk_
       implicit none
-      type(psb_zspmat_type), intent(inout), target  :: a
+      type(psb_zspmat_type), intent(in), target   :: a
       integer(psb_ipk_), intent(in)               :: fillin,alg
       real(psb_dpk_), intent(in)                  :: thresh
       type(psb_zspmat_type), intent(inout)        :: wmat, zmat

amgprec/amg_z_as_smoother.f90

@@ -230,7 +230,7 @@ module amg_z_as_smoother
            & psb_desc_type, psb_z_base_sparse_mat, psb_ipk_,&
            & psb_i_base_vect_type
       implicit none 
-      type(psb_zspmat_type), intent(inout), target     :: a
+      type(psb_zspmat_type), intent(in), target        :: a
       Type(psb_desc_type), Intent(inout)                 :: desc_a 
       class(amg_z_as_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                     :: info

amgprec/amg_z_base_smoother_mod.f90

@@ -237,7 +237,7 @@ module amg_z_base_smoother_mod
            & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, &
            & amg_z_base_smoother_type, psb_ipk_, psb_i_base_vect_type
       ! Arguments
-      type(psb_zspmat_type), intent(inout), target  :: a
+      type(psb_zspmat_type), intent(in), target     :: a
       Type(psb_desc_type), Intent(inout)              :: desc_a 
       class(amg_z_base_smoother_type), intent(inout) :: sm 
       integer(psb_ipk_), intent(out)                  :: info

amgprec/amg_z_base_solver_mod.f90

@@ -170,7 +170,7 @@ module amg_z_base_solver_mod
       Implicit None
       
       ! Arguments
-      type(psb_zspmat_type), intent(inout), target          :: a
+      type(psb_zspmat_type), intent(in), target             :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_z_base_solver_type), intent(inout)          :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/amg_z_diag_solver.f90

@@ -119,7 +119,7 @@ module amg_z_diag_solver
       import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
            & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, &
            & amg_z_diag_solver_type, psb_ipk_, psb_i_base_vect_type      
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_z_diag_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                        :: info
@@ -331,7 +331,7 @@ module amg_z_l1_diag_solver
       import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
            & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, &
            & amg_z_l1_diag_solver_type, psb_ipk_, psb_i_base_vect_type      
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                    :: desc_a 
       class(amg_z_l1_diag_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/amg_z_gs_solver.f90

@@ -181,7 +181,7 @@ module amg_z_gs_solver
            & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_z_gs_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -195,7 +195,7 @@ module amg_z_gs_solver
            & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_z_bwgs_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_id_solver.f90

@@ -123,7 +123,7 @@ contains
     Implicit None
 
     ! Arguments
-    type(psb_zspmat_type), intent(inout), target        :: a
+    type(psb_zspmat_type), intent(in), target           :: a
     Type(psb_desc_type), Intent(inout)                  :: desc_a 
     class(amg_z_id_solver_type), intent(inout)          :: sv
     integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_ilu_solver.f90

@@ -144,7 +144,7 @@ module amg_z_ilu_solver
            & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_z_ilu_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_inner_mod.f90

@@ -56,7 +56,7 @@ module amg_z_inner_mod
            & psb_dpk_, psb_z_base_sparse_mat, psb_z_base_vect_type, psb_ipk_
       import :: amg_zprec_type
       implicit none
-      type(psb_zspmat_type), intent(inout), target       :: a
+      type(psb_zspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       type(amg_zprec_type), intent(inout), target        :: prec
       integer(psb_ipk_), intent(out)                       :: info

amgprec/amg_z_invk_solver.f90

@@ -94,7 +94,7 @@ module amg_z_invk_solver
       Implicit None
 
       ! Arguments
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_z_invk_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_invt_solver.f90

@@ -94,7 +94,7 @@ module amg_z_invt_solver
       Implicit None
 
       ! Arguments
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_z_invt_solver_type), intent(inout)        :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_jac_smoother.f90

@@ -151,7 +151,7 @@ module amg_z_jac_smoother
       import :: psb_desc_type, amg_z_jac_smoother_type, psb_z_vect_type, psb_dpk_, &
            & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_z_jac_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info
@@ -274,7 +274,7 @@ module amg_z_jac_smoother
       import :: psb_desc_type, amg_z_l1_jac_smoother_type, psb_z_vect_type, &
            & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_z_l1_jac_smoother_type), intent(inout)       :: sm
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_jac_solver.f90

@@ -143,7 +143,7 @@ module amg_z_jac_solver
            & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_z_jac_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info
@@ -160,7 +160,7 @@ module amg_z_jac_solver
            & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none 
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_z_l1_jac_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_krm_solver.f90

@@ -174,7 +174,7 @@ module amg_z_krm_solver
            & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
            & psb_ipk_, psb_i_base_vect_type
       implicit none
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a
       class(amg_z_krm_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_mumps_solver.F90

@@ -163,7 +163,7 @@ module amg_z_mumps_solver
       Implicit None
 
       ! Arguments
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_z_mumps_solver_type), intent(inout)       :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_prec_type.f90

@@ -311,7 +311,7 @@ module amg_z_prec_type
            & psb_z_base_sparse_mat, psb_z_base_vect_type, &
            & psb_i_base_vect_type, amg_zprec_type, psb_ipk_
       implicit none
-      type(psb_zspmat_type), intent(inout), target       :: a
+      type(psb_zspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       class(amg_zprec_type), intent(inout), target       :: prec
       integer(psb_ipk_), intent(out)                       :: info
@@ -323,15 +323,14 @@ module amg_z_prec_type
   end interface amg_precbld
 
   interface amg_hierarchy_bld
-    subroutine amg_z_hierarchy_bld(a,desc_a,prec,info,cpymat)
+    subroutine amg_z_hierarchy_bld(a,desc_a,prec,info)
       import :: psb_zspmat_type, psb_desc_type, psb_dpk_, &
            & amg_zprec_type, psb_ipk_
       implicit none
-      type(psb_zspmat_type), intent(inout), target       :: a
+      type(psb_zspmat_type), intent(in), target          :: a
       type(psb_desc_type), intent(inout), target           :: desc_a
       class(amg_zprec_type), intent(inout), target        :: prec
       integer(psb_ipk_), intent(out)                       :: info
-      logical, intent(in), optional                        :: cpymat
       !      character, intent(in),optional             :: upd
     end subroutine amg_z_hierarchy_bld
   end interface amg_hierarchy_bld
@@ -636,11 +635,6 @@ contains
     if (allocated(prec%precv)) then
       do i=1,size(prec%precv)
         call prec%precv(i)%free(info)
-        if (psb_errstatus_fatal()) then
-          info=psb_err_internal_error_
-          call psb_errpush(info,name)
-          goto 9999
-        end if
       end do
       deallocate(prec%precv,stat=info)
     end if
@@ -1012,7 +1006,7 @@ contains
     integer(psb_ipk_), intent(out)        :: info
     class(psb_z_base_vect_type), intent(in), optional  :: vmold
     !
-    ! In AMG the DESC optional argument is ignored, since
+    ! In MLD the DESC optional argument is ignored, since
     ! the necessary info is contained in the various entries of the
     ! PRECV component.
     type(psb_desc_type), intent(in), optional  :: desc

amgprec/amg_z_slu_solver.F90

@@ -124,7 +124,7 @@ module amg_z_slu_solver
       Implicit None
 
       ! Arguments
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_z_slu_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                      :: info

amgprec/amg_z_sludist_solver.F90

@@ -259,7 +259,7 @@ contains
     Implicit None
 
     ! Arguments
-    type(psb_zspmat_type), intent(inout), target        :: a
+    type(psb_zspmat_type), intent(in), target           :: a
     Type(psb_desc_type), Intent(inout)                  :: desc_a 
     class(amg_z_sludist_solver_type), intent(inout)     :: sv
     integer, intent(out)                                :: info

amgprec/amg_z_umf_solver.F90

@@ -163,7 +163,7 @@ module amg_z_umf_solver
       Implicit None
       
       ! Arguments
-      type(psb_zspmat_type), intent(inout), target        :: a
+      type(psb_zspmat_type), intent(in), target           :: a
       Type(psb_desc_type), Intent(inout)                  :: desc_a 
       class(amg_z_umf_solver_type), intent(inout)         :: sv
       integer(psb_ipk_), intent(out)                        :: info

amgprec/impl/aggregator/amg_caggrmat_minnrg_bld.f90

@@ -155,7 +155,7 @@ subroutine amg_caggrmat_minnrg_bld(dol1smoothing,a,desc_a,ilaggr,nlaggr,&
   debug_level = psb_get_debug_level()
 
   ctxt = desc_a%get_context()
-  icomm = ctxt%get_mpic()
+  icomm = desc_a%get_mpic()
 
   call psb_info(ctxt, me, np)
 

amgprec/impl/aggregator/amg_daggrmat_minnrg_bld.f90

@@ -155,7 +155,7 @@ subroutine amg_daggrmat_minnrg_bld(dol1smoothing,a,desc_a,ilaggr,nlaggr,&
   debug_level = psb_get_debug_level()
 
   ctxt = desc_a%get_context()
-  icomm = ctxt%get_mpic()
+  icomm = desc_a%get_mpic()
 
   call psb_info(ctxt, me, np)
 

amgprec/impl/aggregator/amg_saggrmat_minnrg_bld.f90

@@ -155,7 +155,7 @@ subroutine amg_saggrmat_minnrg_bld(dol1smoothing,a,desc_a,ilaggr,nlaggr,&
   debug_level = psb_get_debug_level()
 
   ctxt = desc_a%get_context()
-  icomm = ctxt%get_mpic()
+  icomm = desc_a%get_mpic()
 
   call psb_info(ctxt, me, np)
 

amgprec/impl/aggregator/amg_zaggrmat_minnrg_bld.f90

@@ -155,7 +155,7 @@ subroutine amg_zaggrmat_minnrg_bld(dol1smoothing,a,desc_a,ilaggr,nlaggr,&
   debug_level = psb_get_debug_level()
 
   ctxt = desc_a%get_context()
-  icomm = ctxt%get_mpic()
+  icomm = desc_a%get_mpic()
 
   call psb_info(ctxt, me, np)
 

amgprec/impl/amg_c_hierarchy_bld.F90

@@ -63,7 +63,7 @@
 !    info    -  integer, output.
 !               Error code.              
 !  
-subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
+subroutine amg_c_hierarchy_bld(a,desc_a,prec,info)
 
   use psb_base_mod
   use amg_c_inner_mod
@@ -72,11 +72,10 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
   Implicit None
 
   ! Arguments
-  type(psb_cspmat_type), intent(inout), target         :: a
+  type(psb_cspmat_type),intent(in), target             :: a
   type(psb_desc_type), intent(inout), target           :: desc_a
   class(amg_cprec_type),intent(inout),target           :: prec
   integer(psb_ipk_), intent(out)                       :: info
-  logical, intent(in), optional                        :: cpymat
 
   ! Local Variables
   type(psb_ctxt_type) :: ctxt
@@ -91,11 +90,9 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
   type(amg_sml_parms)              :: medparms, coarseparms
   integer(psb_lpk_), allocatable   :: ilaggr(:), nlaggr(:)
   type(psb_lcspmat_type)            :: op_prol
-  type(amg_c_onelev_type), allocatable :: tprecv(:)
-  logical :: cpymat_
+  type(amg_c_onelev_type), allocatable :: tprecv(:)    
   integer(psb_ipk_)  :: debug_level, debug_unit
-  character(len=20)  :: name
-  character(len=40)  :: ch_err
+  character(len=20)  :: name, ch_err
   integer(psb_ipk_), save  :: idx_bldtp=-1, idx_matasb=-1
   logical, parameter :: do_timings=.false.
 
@@ -128,9 +125,7 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
     call psb_errpush(info,name)
     goto 9999
   end if
-  cpymat_ = .false.
-  if (present(cpymat)) cpymat_ = cpymat
-  
+
   !
   ! Check to ensure all procs have the same 
   !   
@@ -185,15 +180,8 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
     ! This is OK, since it may be called by the user even if there
     ! is only one level
     !
-    if (cpymat_) then
-      call a%clone(prec%precv(1)%ac,info)
-      call desc_a%clone(prec%precv(1)%desc_ac,info)
-      prec%precv(1)%base_a    => prec%precv(1)%ac
-      prec%precv(1)%base_desc => prec%precv(1)%desc_ac
-    else
-      prec%precv(1)%base_a    => a
-      prec%precv(1)%base_desc => desc_a
-    end if
+    prec%precv(1)%base_a    => a
+    prec%precv(1)%base_desc => desc_a
 
     call psb_erractionrestore(err_act)
     return
@@ -292,16 +280,10 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
   !
   ! Finest level first; create a GEN_BLOCK
   ! copy of the descriptor. 
-  !
-  if (cpymat_) then
-    call a%clone(prec%precv(1)%ac,info)
-    prec%precv(1)%base_a    => prec%precv(1)%ac
-  else
-    prec%precv(1)%base_a    => a
-  end if
+  ! 
+  prec%precv(1)%base_a    => a
   call psb_cd_renum_block(desc_a,prec%precv(1)%desc_ac,info)
   prec%precv(1)%base_desc => prec%precv(1)%desc_ac
-  
   newsz = 0
   array_build_loop: do i=2, iszv
     !
@@ -334,10 +316,9 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
          & prec%precv(i-1)%base_desc,&
          & ilaggr,nlaggr,op_prol,prec%ag_data,info)
     if (do_timings) call psb_toc(idx_bldtp)
-    if (info /= psb_success_) then
-      write(ch_err,'(a,i7)') 'Map bld fail @ level ',i
+    if (info /= psb_success_) then 
       call psb_errpush(psb_err_internal_error_,name,&
-           & a_err=ch_err)
+           & a_err='Map build')
       goto 9999
     endif
 
@@ -366,10 +347,14 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
 
     if (i>2) then
       if (sizeratio < mnaggratio) then
-        !
-        ! We are not gaining 
-        !
-        newsz = i-1
+        if (sizeratio > 1) then
+          newsz = i
+        else
+          !
+          ! We are not gaining 
+          !
+          newsz = i-1
+        end if
       end if
 
       if (all(nlaggr == prec%precv(i-1)%linmap%naggr)) then 
@@ -404,7 +389,7 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
            & coarse_sm,coarse_sm2,info)
       if (newsz < i) then
         !
-        ! We are going back and revisit a previous level;
+        ! We are going back and revisit a previous leve;
         ! recover the aggregation.
         !
         ilaggr = prec%precv(newsz)%linmap%iaggr
@@ -417,9 +402,8 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
            & ilaggr,nlaggr,op_prol,info)
       if (do_timings) call psb_toc(idx_matasb)      
       if (info /= 0) then 
-        write(ch_err,'(a,i7)') 'Mat asb fail @ level ',newsz
         call psb_errpush(psb_err_internal_error_,name,&
-             & a_err=ch_err)
+             & a_err='Mat asb')
         goto 9999
       endif
       exit array_build_loop
@@ -431,9 +415,8 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
       if (do_timings) call psb_toc(idx_matasb)      
     end if
     if (info /= psb_success_) then 
-      write(ch_err,'(a,i7)') 'Mat asb fail @ level ',i
       call psb_errpush(psb_err_internal_error_,name,&
-           & a_err=ch_err)
+           & a_err='Map build')
       goto 9999
     endif
     if (i<iszv) call prec%precv(i)%update_aggr(prec%precv(i+1),info)
@@ -465,9 +448,6 @@ subroutine amg_c_hierarchy_bld(a,desc_a,prec,info,cpymat)
     iszv = newsz
     ! Fix the pointers, but the level 1 should
     ! be treated differently
-    if (.not.associated(prec%precv(1)%base_a,a)) then
-      prec%precv(1)%base_a => prec%precv(1)%ac
-    end if
     if (.not.associated(prec%precv(1)%base_desc,desc_a)) then
       prec%precv(1)%base_desc => prec%precv(1)%desc_ac
     end if

amgprec/impl/amg_c_smoothers_bld.f90

@@ -101,8 +101,7 @@ subroutine amg_c_smoothers_bld(a,desc_a,prec,info,amold,vmold,imold)
   real(psb_spk_)     :: mnaggratio
   integer(psb_ipk_)   :: coarse_solve_id
   integer(psb_ipk_)   :: debug_level, debug_unit
-  character(len=20)   :: name
-  character(len=40)   :: ch_err
+  character(len=20)   :: name, ch_err
 
   info=psb_success_
   err=0
@@ -297,7 +296,7 @@ subroutine amg_c_smoothers_bld(a,desc_a,prec,info,amold,vmold,imold)
     call prec%precv(i)%bld(info,amold=amold,vmold=vmold,imold=imold,ilv=i)
 
     if (info /= psb_success_) then
-      write(ch_err,'(a,i7)') 'Error @ level ',i
+      write(ch_err,'(a,i7)') 'Error @ level',i
       call psb_errpush(psb_err_internal_error_,name,&
            & a_err=ch_err)
       goto 9999

amgprec/impl/amg_cfile_prec_descr.f90

@@ -88,7 +88,6 @@ subroutine amg_cfile_prec_descr(prec,info,iout,root, verbosity,prefix)
   logical             :: is_symgs
   character(len=20), parameter :: name='amg_file_prec_descr'
   integer(psb_ipk_)  :: iout_, root_, verbosity_
-  integer(psb_lpk_)  :: gl_nrows,gl_ncols,gl_nzeros
   character(1024)    :: prefix_
 
   info = psb_success_
@@ -123,12 +122,6 @@ subroutine amg_cfile_prec_descr(prec,info,iout,root, verbosity,prefix)
     if (root_ == -1) root_ = me
 
     if (verbosity_ >=0) then 
-      gl_nrows = prec%precv(1)%base_a%get_nrows()
-      gl_ncols = prec%precv(1)%base_a%get_ncols()
-      gl_nzeros = prec%precv(1)%base_a%get_nzeros()
-      call psb_sum(ctxt,gl_nrows)
-      call psb_sum(ctxt,gl_ncols)
-      call psb_sum(ctxt,gl_nzeros)
       !
       ! The preconditioner description is printed by processor psb_root_.
       ! This agrees with the fact that all the parameters defining the
@@ -148,11 +141,7 @@ subroutine amg_cfile_prec_descr(prec,info,iout,root, verbosity,prefix)
 
         write(iout_,*) 
         write(iout_,'(a,1x,a)') trim(prefix_),'Preconditioner description'
-        write(iout_,*) 
-        write(iout_,*) trim(prefix_),' Base matrix      : ',&
-             & gl_nrows, gl_ncols, gl_nzeros
-        write(iout_,*)
-        
+
         if (nlev == 1) then
           !
           ! Here we have a gigantic kludge just to handle Symmetrized Gauss-Seidel.

amgprec/impl/amg_cmlprec_bld.f90

@@ -85,7 +85,7 @@ subroutine amg_cmlprec_bld(a,desc_a,p,info,amold,vmold,imold)
   Implicit None
 
   ! Arguments
-  type(psb_cspmat_type), intent(inout), target       :: a
+  type(psb_cspmat_type),intent(in), target           :: a
   type(psb_desc_type), intent(inout), target           :: desc_a
   type(amg_cprec_type),intent(inout),target          :: p
   integer(psb_ipk_), intent(out)                       :: info

amgprec/impl/amg_cprecbld.f90

@@ -65,7 +65,7 @@ subroutine amg_cprecbld(a,desc_a,prec,info,amold,vmold,imold)
   Implicit None
 
   ! Arguments
-  type(psb_cspmat_type),intent(inout), target        :: a
+  type(psb_cspmat_type),intent(in), target           :: a
   type(psb_desc_type), intent(inout), target           :: desc_a
   class(amg_cprec_type),intent(inout), target         :: prec
   integer(psb_ipk_), intent(out)                               :: info

amgprec/impl/amg_d_hierarchy_bld.F90

@@ -63,7 +63,7 @@
 !    info    -  integer, output.
 !               Error code.              
 !  
-subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
+subroutine amg_d_hierarchy_bld(a,desc_a,prec,info)
 
   use psb_base_mod
   use amg_d_inner_mod
@@ -72,11 +72,10 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
   Implicit None
 
   ! Arguments
-  type(psb_dspmat_type), intent(inout), target         :: a
+  type(psb_dspmat_type),intent(in), target             :: a
   type(psb_desc_type), intent(inout), target           :: desc_a
   class(amg_dprec_type),intent(inout),target           :: prec
   integer(psb_ipk_), intent(out)                       :: info
-  logical, intent(in), optional                        :: cpymat
 
   ! Local Variables
   type(psb_ctxt_type) :: ctxt
@@ -91,11 +90,9 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
   type(amg_dml_parms)              :: medparms, coarseparms
   integer(psb_lpk_), allocatable   :: ilaggr(:), nlaggr(:)
   type(psb_ldspmat_type)            :: op_prol
-  type(amg_d_onelev_type), allocatable :: tprecv(:)
-  logical :: cpymat_
+  type(amg_d_onelev_type), allocatable :: tprecv(:)    
   integer(psb_ipk_)  :: debug_level, debug_unit
-  character(len=20)  :: name
-  character(len=40)  :: ch_err
+  character(len=20)  :: name, ch_err
   integer(psb_ipk_), save  :: idx_bldtp=-1, idx_matasb=-1
   logical, parameter :: do_timings=.false.
 
@@ -128,9 +125,7 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
     call psb_errpush(info,name)
     goto 9999
   end if
-  cpymat_ = .false.
-  if (present(cpymat)) cpymat_ = cpymat
-  
+
   !
   ! Check to ensure all procs have the same 
   !   
@@ -185,15 +180,8 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
     ! This is OK, since it may be called by the user even if there
     ! is only one level
     !
-    if (cpymat_) then
-      call a%clone(prec%precv(1)%ac,info)
-      call desc_a%clone(prec%precv(1)%desc_ac,info)
-      prec%precv(1)%base_a    => prec%precv(1)%ac
-      prec%precv(1)%base_desc => prec%precv(1)%desc_ac
-    else
-      prec%precv(1)%base_a    => a
-      prec%precv(1)%base_desc => desc_a
-    end if
+    prec%precv(1)%base_a    => a
+    prec%precv(1)%base_desc => desc_a
 
     call psb_erractionrestore(err_act)
     return
@@ -292,16 +280,10 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
   !
   ! Finest level first; create a GEN_BLOCK
   ! copy of the descriptor. 
-  !
-  if (cpymat_) then
-    call a%clone(prec%precv(1)%ac,info)
-    prec%precv(1)%base_a    => prec%precv(1)%ac
-  else
-    prec%precv(1)%base_a    => a
-  end if
+  ! 
+  prec%precv(1)%base_a    => a
   call psb_cd_renum_block(desc_a,prec%precv(1)%desc_ac,info)
   prec%precv(1)%base_desc => prec%precv(1)%desc_ac
-  
   newsz = 0
   array_build_loop: do i=2, iszv
     !
@@ -334,10 +316,9 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
          & prec%precv(i-1)%base_desc,&
          & ilaggr,nlaggr,op_prol,prec%ag_data,info)
     if (do_timings) call psb_toc(idx_bldtp)
-    if (info /= psb_success_) then
-      write(ch_err,'(a,i7)') 'Map bld fail @ level ',i
+    if (info /= psb_success_) then 
       call psb_errpush(psb_err_internal_error_,name,&
-           & a_err=ch_err)
+           & a_err='Map build')
       goto 9999
     endif
 
@@ -366,10 +347,14 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
 
     if (i>2) then
       if (sizeratio < mnaggratio) then
-        !
-        ! We are not gaining 
-        !
-        newsz = i-1
+        if (sizeratio > 1) then
+          newsz = i
+        else
+          !
+          ! We are not gaining 
+          !
+          newsz = i-1
+        end if
       end if
 
       if (all(nlaggr == prec%precv(i-1)%linmap%naggr)) then 
@@ -404,7 +389,7 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
            & coarse_sm,coarse_sm2,info)
       if (newsz < i) then
         !
-        ! We are going back and revisit a previous level;
+        ! We are going back and revisit a previous leve;
         ! recover the aggregation.
         !
         ilaggr = prec%precv(newsz)%linmap%iaggr
@@ -417,9 +402,8 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
            & ilaggr,nlaggr,op_prol,info)
       if (do_timings) call psb_toc(idx_matasb)      
       if (info /= 0) then 
-        write(ch_err,'(a,i7)') 'Mat asb fail @ level ',newsz
         call psb_errpush(psb_err_internal_error_,name,&
-             & a_err=ch_err)
+             & a_err='Mat asb')
         goto 9999
       endif
       exit array_build_loop
@@ -431,9 +415,8 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
       if (do_timings) call psb_toc(idx_matasb)      
     end if
     if (info /= psb_success_) then 
-      write(ch_err,'(a,i7)') 'Mat asb fail @ level ',i
       call psb_errpush(psb_err_internal_error_,name,&
-           & a_err=ch_err)
+           & a_err='Map build')
       goto 9999
     endif
     if (i<iszv) call prec%precv(i)%update_aggr(prec%precv(i+1),info)
@@ -465,9 +448,6 @@ subroutine amg_d_hierarchy_bld(a,desc_a,prec,info,cpymat)
     iszv = newsz
     ! Fix the pointers, but the level 1 should
     ! be treated differently
-    if (.not.associated(prec%precv(1)%base_a,a)) then
-      prec%precv(1)%base_a => prec%precv(1)%ac
-    end if
     if (.not.associated(prec%precv(1)%base_desc,desc_a)) then
       prec%precv(1)%base_desc => prec%precv(1)%desc_ac
     end if

amgprec/impl/amg_d_smoothers_bld.f90

@@ -101,8 +101,7 @@ subroutine amg_d_smoothers_bld(a,desc_a,prec,info,amold,vmold,imold)
   real(psb_dpk_)     :: mnaggratio
   integer(psb_ipk_)   :: coarse_solve_id
   integer(psb_ipk_)   :: debug_level, debug_unit
-  character(len=20)   :: name
-  character(len=40)   :: ch_err
+  character(len=20)   :: name, ch_err
 
   info=psb_success_
   err=0
@@ -297,7 +296,7 @@ subroutine amg_d_smoothers_bld(a,desc_a,prec,info,amold,vmold,imold)
     call prec%precv(i)%bld(info,amold=amold,vmold=vmold,imold=imold,ilv=i)
 
     if (info /= psb_success_) then
-      write(ch_err,'(a,i7)') 'Error @ level ',i
+      write(ch_err,'(a,i7)') 'Error @ level',i
       call psb_errpush(psb_err_internal_error_,name,&
            & a_err=ch_err)
       goto 9999

amgprec/impl/amg_dfile_prec_descr.f90

@@ -88,7 +88,6 @@ subroutine amg_dfile_prec_descr(prec,info,iout,root, verbosity,prefix)
   logical             :: is_symgs
   character(len=20), parameter :: name='amg_file_prec_descr'
   integer(psb_ipk_)  :: iout_, root_, verbosity_
-  integer(psb_lpk_)  :: gl_nrows,gl_ncols,gl_nzeros
   character(1024)    :: prefix_
 
   info = psb_success_
@@ -123,12 +122,6 @@ subroutine amg_dfile_prec_descr(prec,info,iout,root, verbosity,prefix)
     if (root_ == -1) root_ = me
 
     if (verbosity_ >=0) then 
-      gl_nrows = prec%precv(1)%base_a%get_nrows()
-      gl_ncols = prec%precv(1)%base_a%get_ncols()
-      gl_nzeros = prec%precv(1)%base_a%get_nzeros()
-      call psb_sum(ctxt,gl_nrows)
-      call psb_sum(ctxt,gl_ncols)
-      call psb_sum(ctxt,gl_nzeros)
       !
       ! The preconditioner description is printed by processor psb_root_.
       ! This agrees with the fact that all the parameters defining the
@@ -148,11 +141,7 @@ subroutine amg_dfile_prec_descr(prec,info,iout,root, verbosity,prefix)
 
         write(iout_,*) 
         write(iout_,'(a,1x,a)') trim(prefix_),'Preconditioner description'
-        write(iout_,*) 
-        write(iout_,*) trim(prefix_),' Base matrix      : ',&
-             & gl_nrows, gl_ncols, gl_nzeros
-        write(iout_,*)
-        
+
         if (nlev == 1) then
           !
           ! Here we have a gigantic kludge just to handle Symmetrized Gauss-Seidel.

amgprec/impl/amg_dmlprec_bld.f90

@@ -85,7 +85,7 @@ subroutine amg_dmlprec_bld(a,desc_a,p,info,amold,vmold,imold)
   Implicit None
 
   ! Arguments
-  type(psb_dspmat_type), intent(inout), target       :: a
+  type(psb_dspmat_type),intent(in), target           :: a
   type(psb_desc_type), intent(inout), target           :: desc_a
   type(amg_dprec_type),intent(inout),target          :: p
   integer(psb_ipk_), intent(out)                       :: info

amgprec/impl/amg_dprecbld.f90

@@ -65,7 +65,7 @@ subroutine amg_dprecbld(a,desc_a,prec,info,amold,vmold,imold)
   Implicit None
 
   ! Arguments
-  type(psb_dspmat_type),intent(inout), target        :: a
+  type(psb_dspmat_type),intent(in), target           :: a
   type(psb_desc_type), intent(inout), target           :: desc_a
   class(amg_dprec_type),intent(inout), target         :: prec
   integer(psb_ipk_), intent(out)                               :: info

amgprec/impl/amg_s_hierarchy_bld.F90

@@ -63,7 +63,7 @@
 !    info    -  integer, output.
 !               Error code.              
 !  
-subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
+subroutine amg_s_hierarchy_bld(a,desc_a,prec,info)
 
   use psb_base_mod
   use amg_s_inner_mod
@@ -72,11 +72,10 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
   Implicit None
 
   ! Arguments
-  type(psb_sspmat_type), intent(inout), target         :: a
+  type(psb_sspmat_type),intent(in), target             :: a
   type(psb_desc_type), intent(inout), target           :: desc_a
   class(amg_sprec_type),intent(inout),target           :: prec
   integer(psb_ipk_), intent(out)                       :: info
-  logical, intent(in), optional                        :: cpymat
 
   ! Local Variables
   type(psb_ctxt_type) :: ctxt
@@ -91,11 +90,9 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
   type(amg_sml_parms)              :: medparms, coarseparms
   integer(psb_lpk_), allocatable   :: ilaggr(:), nlaggr(:)
   type(psb_lsspmat_type)            :: op_prol
-  type(amg_s_onelev_type), allocatable :: tprecv(:)
-  logical :: cpymat_
+  type(amg_s_onelev_type), allocatable :: tprecv(:)    
   integer(psb_ipk_)  :: debug_level, debug_unit
-  character(len=20)  :: name
-  character(len=40)  :: ch_err
+  character(len=20)  :: name, ch_err
   integer(psb_ipk_), save  :: idx_bldtp=-1, idx_matasb=-1
   logical, parameter :: do_timings=.false.
 
@@ -128,9 +125,7 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
     call psb_errpush(info,name)
     goto 9999
   end if
-  cpymat_ = .false.
-  if (present(cpymat)) cpymat_ = cpymat
-  
+
   !
   ! Check to ensure all procs have the same 
   !   
@@ -185,15 +180,8 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
     ! This is OK, since it may be called by the user even if there
     ! is only one level
     !
-    if (cpymat_) then
-      call a%clone(prec%precv(1)%ac,info)
-      call desc_a%clone(prec%precv(1)%desc_ac,info)
-      prec%precv(1)%base_a    => prec%precv(1)%ac
-      prec%precv(1)%base_desc => prec%precv(1)%desc_ac
-    else
-      prec%precv(1)%base_a    => a
-      prec%precv(1)%base_desc => desc_a
-    end if
+    prec%precv(1)%base_a    => a
+    prec%precv(1)%base_desc => desc_a
 
     call psb_erractionrestore(err_act)
     return
@@ -292,16 +280,10 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
   !
   ! Finest level first; create a GEN_BLOCK
   ! copy of the descriptor. 
-  !
-  if (cpymat_) then
-    call a%clone(prec%precv(1)%ac,info)
-    prec%precv(1)%base_a    => prec%precv(1)%ac
-  else
-    prec%precv(1)%base_a    => a
-  end if
+  ! 
+  prec%precv(1)%base_a    => a
   call psb_cd_renum_block(desc_a,prec%precv(1)%desc_ac,info)
   prec%precv(1)%base_desc => prec%precv(1)%desc_ac
-  
   newsz = 0
   array_build_loop: do i=2, iszv
     !
@@ -334,10 +316,9 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
          & prec%precv(i-1)%base_desc,&
          & ilaggr,nlaggr,op_prol,prec%ag_data,info)
     if (do_timings) call psb_toc(idx_bldtp)
-    if (info /= psb_success_) then
-      write(ch_err,'(a,i7)') 'Map bld fail @ level ',i
+    if (info /= psb_success_) then 
       call psb_errpush(psb_err_internal_error_,name,&
-           & a_err=ch_err)
+           & a_err='Map build')
       goto 9999
     endif
 
@@ -366,10 +347,14 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
 
     if (i>2) then
       if (sizeratio < mnaggratio) then
-        !
-        ! We are not gaining 
-        !
-        newsz = i-1
+        if (sizeratio > 1) then
+          newsz = i
+        else
+          !
+          ! We are not gaining 
+          !
+          newsz = i-1
+        end if
       end if
 
       if (all(nlaggr == prec%precv(i-1)%linmap%naggr)) then 
@@ -404,7 +389,7 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
            & coarse_sm,coarse_sm2,info)
       if (newsz < i) then
         !
-        ! We are going back and revisit a previous level;
+        ! We are going back and revisit a previous leve;
         ! recover the aggregation.
         !
         ilaggr = prec%precv(newsz)%linmap%iaggr
@@ -417,9 +402,8 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
            & ilaggr,nlaggr,op_prol,info)
       if (do_timings) call psb_toc(idx_matasb)      
       if (info /= 0) then 
-        write(ch_err,'(a,i7)') 'Mat asb fail @ level ',newsz
         call psb_errpush(psb_err_internal_error_,name,&
-             & a_err=ch_err)
+             & a_err='Mat asb')
         goto 9999
       endif
       exit array_build_loop
@@ -431,9 +415,8 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
       if (do_timings) call psb_toc(idx_matasb)      
     end if
     if (info /= psb_success_) then 
-      write(ch_err,'(a,i7)') 'Mat asb fail @ level ',i
       call psb_errpush(psb_err_internal_error_,name,&
-           & a_err=ch_err)
+           & a_err='Map build')
       goto 9999
     endif
     if (i<iszv) call prec%precv(i)%update_aggr(prec%precv(i+1),info)
@@ -465,9 +448,6 @@ subroutine amg_s_hierarchy_bld(a,desc_a,prec,info,cpymat)
     iszv = newsz
     ! Fix the pointers, but the level 1 should
     ! be treated differently
-    if (.not.associated(prec%precv(1)%base_a,a)) then
-      prec%precv(1)%base_a => prec%precv(1)%ac
-    end if
     if (.not.associated(prec%precv(1)%base_desc,desc_a)) then
       prec%precv(1)%base_desc => prec%precv(1)%desc_ac
     end if

amgprec/impl/amg_s_smoothers_bld.f90

@@ -101,8 +101,7 @@ subroutine amg_s_smoothers_bld(a,desc_a,prec,info,amold,vmold,imold)
   real(psb_spk_)     :: mnaggratio
   integer(psb_ipk_)   :: coarse_solve_id
   integer(psb_ipk_)   :: debug_level, debug_unit
-  character(len=20)   :: name
-  character(len=40)   :: ch_err
+  character(len=20)   :: name, ch_err
 
   info=psb_success_
   err=0
@@ -297,7 +296,7 @@ subroutine amg_s_smoothers_bld(a,desc_a,prec,info,amold,vmold,imold)
     call prec%precv(i)%bld(info,amold=amold,vmold=vmold,imold=imold,ilv=i)
 
     if (info /= psb_success_) then
-      write(ch_err,'(a,i7)') 'Error @ level ',i
+      write(ch_err,'(a,i7)') 'Error @ level',i
       call psb_errpush(psb_err_internal_error_,name,&
            & a_err=ch_err)
       goto 9999

amgprec/impl/amg_sfile_prec_descr.f90

@@ -88,7 +88,6 @@ subroutine amg_sfile_prec_descr(prec,info,iout,root, verbosity,prefix)
   logical             :: is_symgs
   character(len=20), parameter :: name='amg_file_prec_descr'
   integer(psb_ipk_)  :: iout_, root_, verbosity_
-  integer(psb_lpk_)  :: gl_nrows,gl_ncols,gl_nzeros
   character(1024)    :: prefix_
 
   info = psb_success_
@@ -123,12 +122,6 @@ subroutine amg_sfile_prec_descr(prec,info,iout,root, verbosity,prefix)
     if (root_ == -1) root_ = me
 
     if (verbosity_ >=0) then 
-      gl_nrows = prec%precv(1)%base_a%get_nrows()
-      gl_ncols = prec%precv(1)%base_a%get_ncols()
-      gl_nzeros = prec%precv(1)%base_a%get_nzeros()
-      call psb_sum(ctxt,gl_nrows)
-      call psb_sum(ctxt,gl_ncols)
-      call psb_sum(ctxt,gl_nzeros)
       !
       ! The preconditioner description is printed by processor psb_root_.
       ! This agrees with the fact that all the parameters defining the
@@ -148,11 +141,7 @@ subroutine amg_sfile_prec_descr(prec,info,iout,root, verbosity,prefix)
 
         write(iout_,*) 
         write(iout_,'(a,1x,a)') trim(prefix_),'Preconditioner description'
-        write(iout_,*) 
-        write(iout_,*) trim(prefix_),' Base matrix      : ',&
-             & gl_nrows, gl_ncols, gl_nzeros
-        write(iout_,*)
-        
+
         if (nlev == 1) then
           !
           ! Here we have a gigantic kludge just to handle Symmetrized Gauss-Seidel.

amgprec/impl/amg_smlprec_bld.f90

@@ -85,7 +85,7 @@ subroutine amg_smlprec_bld(a,desc_a,p,info,amold,vmold,imold)
   Implicit None
 
   ! Arguments
-  type(psb_sspmat_type), intent(inout), target       :: a
+  type(psb_sspmat_type),intent(in), target           :: a
   type(psb_desc_type), intent(inout), target           :: desc_a
   type(amg_sprec_type),intent(inout),target          :: p
   integer(psb_ipk_), intent(out)                       :: info

amgprec/impl/amg_sprecbld.f90

@@ -65,7 +65,7 @@ subroutine amg_sprecbld(a,desc_a,prec,info,amold,vmold,imold)
   Implicit None
 
   ! Arguments
-  type(psb_sspmat_type),intent(inout), target        :: a
+  type(psb_sspmat_type),intent(in), target           :: a
   type(psb_desc_type), intent(inout), target           :: desc_a
   class(amg_sprec_type),intent(inout), target         :: prec
   integer(psb_ipk_), intent(out)                               :: info