mld2p4-2:

mlprec/impl/mld_c_hierarchy_bld.f90
 mlprec/impl/mld_c_smoothers_bld.f90
 mlprec/impl/mld_d_hierarchy_bld.f90
 mlprec/impl/mld_d_smoothers_bld.f90
 mlprec/impl/mld_s_hierarchy_bld.f90
 mlprec/impl/mld_s_smoothers_bld.f90
 mlprec/impl/mld_z_hierarchy_bld.f90
 mlprec/impl/mld_z_smoothers_bld.f90

Allow being called with just 1 level (BJAC).

mlprec/impl/mld_c_hierarchy_bld.f90

@@ -174,13 +174,26 @@ subroutine mld_c_hierarchy_bld(a,desc_a,p,info)
     goto 9999
   end if
 
-  if (iszv <= 1) then
+  if (iszv < 1) then
-    ! We should only ever get here for multilevel.
+    !
+    ! This is wrong, cannot be size <1
+    !
     info=psb_err_from_subroutine_
     ch_err='size bpv'
     call psb_errpush(info,name,a_err=ch_err)
     goto 9999
   endif
+  if (iszv == 1) then
+    !
+    ! This is OK, since it may be called by the user even if there
+    ! is only one level
+    !
+    p%precv(1)%base_a    => a
+    p%precv(1)%base_desc => desc_a
+  
+    call psb_erractionrestore(err_act)
+    return
+  endif
 
   !
   ! The strategy:

mlprec/impl/mld_c_smoothers_bld.f90

@@ -157,8 +157,8 @@ subroutine mld_c_smoothers_bld(a,desc_a,p,info,amold,vmold,imold)
     goto 9999
   end if
 
-  if (iszv <= 1) then
+  if (iszv < 1) then
-    ! We should only ever get here for multilevel.
+    ! We should never get here.
     info=psb_err_from_subroutine_
     ch_err='size bpv'
     call psb_errpush(info,name,a_err=ch_err)

mlprec/impl/mld_d_hierarchy_bld.f90

@@ -174,13 +174,26 @@ subroutine mld_d_hierarchy_bld(a,desc_a,p,info)
     goto 9999
   end if
 
-  if (iszv <= 1) then
+  if (iszv < 1) then
-    ! We should only ever get here for multilevel.
+    !
+    ! This is wrong, cannot be size <1
+    !
     info=psb_err_from_subroutine_
     ch_err='size bpv'
     call psb_errpush(info,name,a_err=ch_err)
     goto 9999
   endif
+  if (iszv == 1) then
+    !
+    ! This is OK, since it may be called by the user even if there
+    ! is only one level
+    !
+    p%precv(1)%base_a    => a
+    p%precv(1)%base_desc => desc_a
+  
+    call psb_erractionrestore(err_act)
+    return
+  endif
 
   !
   ! The strategy:

mlprec/impl/mld_d_smoothers_bld.f90

@@ -157,8 +157,8 @@ subroutine mld_d_smoothers_bld(a,desc_a,p,info,amold,vmold,imold)
     goto 9999
   end if
 
-  if (iszv <= 1) then
+  if (iszv < 1) then
-    ! We should only ever get here for multilevel.
+    ! We should never get here.
     info=psb_err_from_subroutine_
     ch_err='size bpv'
     call psb_errpush(info,name,a_err=ch_err)

mlprec/impl/mld_s_hierarchy_bld.f90

@@ -174,13 +174,26 @@ subroutine mld_s_hierarchy_bld(a,desc_a,p,info)
     goto 9999
   end if
 
-  if (iszv <= 1) then
+  if (iszv < 1) then
-    ! We should only ever get here for multilevel.
+    !
+    ! This is wrong, cannot be size <1
+    !
     info=psb_err_from_subroutine_
     ch_err='size bpv'
     call psb_errpush(info,name,a_err=ch_err)
     goto 9999
   endif
+  if (iszv == 1) then
+    !
+    ! This is OK, since it may be called by the user even if there
+    ! is only one level
+    !
+    p%precv(1)%base_a    => a
+    p%precv(1)%base_desc => desc_a
+  
+    call psb_erractionrestore(err_act)
+    return
+  endif
 
   !
   ! The strategy:

mlprec/impl/mld_s_smoothers_bld.f90

@@ -157,8 +157,8 @@ subroutine mld_s_smoothers_bld(a,desc_a,p,info,amold,vmold,imold)
     goto 9999
   end if
 
-  if (iszv <= 1) then
+  if (iszv < 1) then
-    ! We should only ever get here for multilevel.
+    ! We should never get here.
     info=psb_err_from_subroutine_
     ch_err='size bpv'
     call psb_errpush(info,name,a_err=ch_err)

mlprec/impl/mld_z_hierarchy_bld.f90

@@ -174,13 +174,26 @@ subroutine mld_z_hierarchy_bld(a,desc_a,p,info)
     goto 9999
   end if
 
-  if (iszv <= 1) then
+  if (iszv < 1) then
-    ! We should only ever get here for multilevel.
+    !
+    ! This is wrong, cannot be size <1
+    !
     info=psb_err_from_subroutine_
     ch_err='size bpv'
     call psb_errpush(info,name,a_err=ch_err)
     goto 9999
   endif
+  if (iszv == 1) then
+    !
+    ! This is OK, since it may be called by the user even if there
+    ! is only one level
+    !
+    p%precv(1)%base_a    => a
+    p%precv(1)%base_desc => desc_a
+  
+    call psb_erractionrestore(err_act)
+    return
+  endif
 
   !
   ! The strategy:

mlprec/impl/mld_z_smoothers_bld.f90

@@ -157,8 +157,8 @@ subroutine mld_z_smoothers_bld(a,desc_a,p,info,amold,vmold,imold)
     goto 9999
   end if
 
-  if (iszv <= 1) then
+  if (iszv < 1) then
-    ! We should only ever get here for multilevel.
+    ! We should never get here.
     info=psb_err_from_subroutine_
     ch_err='size bpv'
     call psb_errpush(info,name,a_err=ch_err)