diff --git a/mlprec/impl/aggregator/mld_d_dec_aggregator_mat_bld.f90 b/mlprec/impl/aggregator/mld_d_dec_aggregator_mat_bld.f90
index fa8bd60b..5c956dac 100644
--- a/mlprec/impl/aggregator/mld_d_dec_aggregator_mat_bld.f90
+++ b/mlprec/impl/aggregator/mld_d_dec_aggregator_mat_bld.f90
@@ -133,7 +133,8 @@
 !    info       -  integer, output.
 !                  Error code.
 !  
-subroutine  mld_d_dec_aggregator_mat_bld(ag,parms,a,desc_a,ilaggr,nlaggr,ac,op_prol,op_restr,info)
+subroutine  mld_d_dec_aggregator_mat_bld(ag,parms,a,desc_a,ilaggr,nlaggr,&
+     & ac,desc_ac,op_prol,op_restr,info)
   use psb_base_mod
   use mld_d_prec_type, mld_protect_name => mld_d_dec_aggregator_mat_bld
   use mld_d_inner_mod 
@@ -146,6 +147,7 @@ subroutine  mld_d_dec_aggregator_mat_bld(ag,parms,a,desc_a,ilaggr,nlaggr,ac,op_p
   integer(psb_lpk_), intent(inout)     :: ilaggr(:), nlaggr(:)
   type(psb_ldspmat_type), intent(inout)   :: op_prol
   type(psb_ldspmat_type), intent(out)   :: ac,op_restr
+  type(psb_desc_type), intent(inout)       :: desc_ac
   integer(psb_ipk_), intent(out)       :: info
 
   ! Local variables
@@ -177,22 +179,22 @@ subroutine  mld_d_dec_aggregator_mat_bld(ag,parms,a,desc_a,ilaggr,nlaggr,ac,op_p
   case (mld_no_smooth_) 
 
     call mld_daggrmat_nosmth_bld(a,desc_a,ilaggr,nlaggr,&
-         & parms,ac,op_prol,op_restr,info)
+         & parms,ac,desc_ac,op_prol,op_restr,info)
 
   case(mld_smooth_prol_) 
 
     call mld_daggrmat_smth_bld(a,desc_a,ilaggr,nlaggr, &
-         & parms,ac,op_prol,op_restr,info)
+         & parms,ac,desc_ac,op_prol,op_restr,info)
 
-  case(mld_biz_prol_) 
-
-    call mld_daggrmat_biz_bld(a,desc_a,ilaggr,nlaggr, &
-         & parms,ac,op_prol,op_restr,info)
+!!$  case(mld_biz_prol_) 
+!!$
+!!$    call mld_daggrmat_biz_bld(a,desc_a,ilaggr,nlaggr, &
+!!$         & parms,ac,desc_ac,op_prol,op_restr,info)
 
   case(mld_min_energy_) 
 
     call mld_daggrmat_minnrg_bld(a,desc_a,ilaggr,nlaggr, &
-         & parms,ac,op_prol,op_restr,info)
+         & parms,ac,desc_ac,op_prol,op_restr,info)
 
   case default
     info = psb_err_internal_error_
diff --git a/mlprec/impl/aggregator/mld_daggrmat_biz_bld.f90 b/mlprec/impl/aggregator/mld_daggrmat_biz_bld.f90
index 055f8b8c..c9e3b86c 100644
--- a/mlprec/impl/aggregator/mld_daggrmat_biz_bld.f90
+++ b/mlprec/impl/aggregator/mld_daggrmat_biz_bld.f90
@@ -80,7 +80,7 @@
 !    info       -  integer, output.
 !                  Error code.
 !
-subroutine mld_daggrmat_biz_bld(a,desc_a,ilaggr,nlaggr,parms,ac,op_prol,op_restr,info)
+subroutine mld_daggrmat_biz_bld(a,desc_a,ilaggr,nlaggr,parms,ac,desc_ac,op_prol,op_restr,info)
   use psb_base_mod
   use mld_base_prec_type
   use mld_d_inner_mod, mld_protect_name => mld_daggrmat_biz_bld
@@ -95,6 +95,7 @@ subroutine mld_daggrmat_biz_bld(a,desc_a,ilaggr,nlaggr,parms,ac,op_prol,op_restr
   type(mld_dml_parms), intent(inout)    :: parms 
   type(psb_ldspmat_type), intent(inout)  :: op_prol
   type(psb_ldspmat_type), intent(out)    :: ac,op_restr
+  type(psb_desc_type), intent(inout)       :: desc_ac
   integer(psb_ipk_), intent(out)           :: info
 
   ! Local variables
diff --git a/mlprec/impl/aggregator/mld_daggrmat_minnrg_bld.f90 b/mlprec/impl/aggregator/mld_daggrmat_minnrg_bld.f90
index dac54e8f..9065e3c5 100644
--- a/mlprec/impl/aggregator/mld_daggrmat_minnrg_bld.f90
+++ b/mlprec/impl/aggregator/mld_daggrmat_minnrg_bld.f90
@@ -104,7 +104,8 @@
 !                  Error code.
 !
 !
-subroutine mld_daggrmat_minnrg_bld(a,desc_a,ilaggr,nlaggr,parms,ac,op_prol,op_restr,info)
+subroutine mld_daggrmat_minnrg_bld(a,desc_a,ilaggr,nlaggr,parms,&
+     &ac,desc_ac,op_prol,op_restr,info)
   use psb_base_mod
   use mld_base_prec_type
   use mld_d_inner_mod, mld_protect_name => mld_daggrmat_minnrg_bld
@@ -118,6 +119,7 @@ subroutine mld_daggrmat_minnrg_bld(a,desc_a,ilaggr,nlaggr,parms,ac,op_prol,op_re
   type(mld_dml_parms), intent(inout)         :: parms 
   type(psb_ldspmat_type), intent(inout)       :: op_prol
   type(psb_ldspmat_type), intent(out)         :: ac,op_restr
+  type(psb_desc_type), intent(inout)       :: desc_ac
   integer(psb_ipk_), intent(out)                :: info
 
   ! Local variables
diff --git a/mlprec/impl/aggregator/mld_daggrmat_nosmth_bld.f90 b/mlprec/impl/aggregator/mld_daggrmat_nosmth_bld.f90
index 50640c23..50511fb4 100644
--- a/mlprec/impl/aggregator/mld_daggrmat_nosmth_bld.f90
+++ b/mlprec/impl/aggregator/mld_daggrmat_nosmth_bld.f90
@@ -96,7 +96,8 @@
 !                  Error code.
 !
 !
-subroutine mld_daggrmat_nosmth_bld(a,desc_a,ilaggr,nlaggr,parms,ac,op_prol,op_restr,info)
+subroutine mld_daggrmat_nosmth_bld(a,desc_a,ilaggr,nlaggr,parms,&
+     & ac,desc_ac,op_prol,op_restr,info)
   use psb_base_mod
   use mld_base_prec_type
   use mld_d_inner_mod, mld_protect_name => mld_daggrmat_nosmth_bld
@@ -110,6 +111,7 @@ subroutine mld_daggrmat_nosmth_bld(a,desc_a,ilaggr,nlaggr,parms,ac,op_prol,op_re
   type(mld_dml_parms), intent(inout)      :: parms 
   type(psb_ldspmat_type), intent(inout)    :: op_prol
   type(psb_ldspmat_type), intent(out)      :: ac,op_restr
+  type(psb_desc_type), intent(inout)       :: desc_ac
   integer(psb_ipk_), intent(out)             :: info
 
   ! Local variables
diff --git a/mlprec/impl/aggregator/mld_daggrmat_smth_bld.f90 b/mlprec/impl/aggregator/mld_daggrmat_smth_bld.f90
index 95ca613b..1efad4ff 100644
--- a/mlprec/impl/aggregator/mld_daggrmat_smth_bld.f90
+++ b/mlprec/impl/aggregator/mld_daggrmat_smth_bld.f90
@@ -102,7 +102,8 @@
 !    info       -  integer, output.
 !                  Error code.
 !
-subroutine mld_daggrmat_smth_bld(a,desc_a,ilaggr,nlaggr,parms,ac,op_prol,op_restr,info)
+subroutine mld_daggrmat_smth_bld(a,desc_a,ilaggr,nlaggr,parms,&
+     & ac,desc_ac,op_prol,op_restr,info)
   use psb_base_mod
   use mld_base_prec_type
   use mld_d_inner_mod, mld_protect_name => mld_daggrmat_smth_bld
@@ -117,6 +118,7 @@ subroutine mld_daggrmat_smth_bld(a,desc_a,ilaggr,nlaggr,parms,ac,op_prol,op_rest
   type(mld_dml_parms), intent(inout)    :: parms 
   type(psb_ldspmat_type), intent(inout)  :: op_prol
   type(psb_ldspmat_type), intent(out)    :: ac,op_restr
+  type(psb_desc_type), intent(inout)       :: desc_ac
   integer(psb_ipk_), intent(out)           :: info
 
   ! Local variables
diff --git a/mlprec/impl/level/mld_d_base_onelev_mat_asb.f90 b/mlprec/impl/level/mld_d_base_onelev_mat_asb.f90
index 2e5cb2ee..433d11ce 100644
--- a/mlprec/impl/level/mld_d_base_onelev_mat_asb.f90
+++ b/mlprec/impl/level/mld_d_base_onelev_mat_asb.f90
@@ -141,7 +141,8 @@ subroutine mld_d_base_onelev_mat_asb(lv,a,desc_a,ilaggr,nlaggr,op_prol,info)
   ! the mapping defined by mld_aggrmap_bld and applying the aggregation
   ! algorithm specified by lv%iprcparm(mld_aggr_prol_)
   !
-  call lv%aggr%mat_bld(lv%parms,a,desc_a,ilaggr,nlaggr,lac,op_prol,op_restr,info)
+  call lv%aggr%mat_bld(lv%parms,a,desc_a,ilaggr,nlaggr,&
+       & lac,lv%desc_ac,op_prol,op_restr,info)
 
   if(info /= psb_success_) then
     call psb_errpush(psb_err_from_subroutine_,name,a_err='mld_aggrmat_asb')
diff --git a/mlprec/mld_d_base_aggregator_mod.f90 b/mlprec/mld_d_base_aggregator_mod.f90
index 46abd1e4..9a1797ac 100644
--- a/mlprec/mld_d_base_aggregator_mod.f90
+++ b/mlprec/mld_d_base_aggregator_mod.f90
@@ -369,8 +369,8 @@ contains
   !!                   in many cases it is the transpose of the prolongator. 
   !!  \param info    Return code
   !!  
-  subroutine  mld_d_base_aggregator_mat_bld(ag,parms,a,desc_a,ilaggr,nlaggr,ac,&
-       & op_prol,op_restr,info)
+  subroutine  mld_d_base_aggregator_mat_bld(ag,parms,a,desc_a,ilaggr,nlaggr,&
+       & ac,desc_ac,op_prol,op_restr,info)
     use psb_base_mod
     implicit none
     class(mld_d_base_aggregator_type), target, intent(inout) :: ag
@@ -380,6 +380,7 @@ contains
     integer(psb_lpk_), intent(inout)     :: ilaggr(:), nlaggr(:)
     type(psb_ldspmat_type), intent(inout) :: op_prol
     type(psb_ldspmat_type), intent(out)   :: ac,op_restr
+    type(psb_desc_type), intent(inout)    :: desc_ac
     integer(psb_ipk_), intent(out)       :: info
     integer(psb_ipk_) :: err_act
     character(len=20) :: name='d_base_aggregator_mat_bld'
diff --git a/mlprec/mld_d_dec_aggregator_mod.f90 b/mlprec/mld_d_dec_aggregator_mod.f90
index 4df1f987..bd2ddde2 100644
--- a/mlprec/mld_d_dec_aggregator_mod.f90
+++ b/mlprec/mld_d_dec_aggregator_mod.f90
@@ -109,8 +109,8 @@ module mld_d_dec_aggregator_mod
   end interface
 
   interface
-    subroutine  mld_d_dec_aggregator_mat_bld(ag,parms,a,desc_a,ilaggr,nlaggr,ac,&
-         & op_prol,op_restr,info)
+    subroutine  mld_d_dec_aggregator_mat_bld(ag,parms,a,desc_a,ilaggr,nlaggr,&
+         & ac,desc_ac,op_prol,op_restr,info)
       import :: mld_d_dec_aggregator_type, psb_desc_type, psb_dspmat_type, psb_dpk_,  &
            & psb_ipk_, psb_lpk_, psb_ldspmat_type, mld_dml_parms
       implicit none
@@ -121,6 +121,7 @@ module mld_d_dec_aggregator_mod
       integer(psb_lpk_), intent(inout)     :: ilaggr(:), nlaggr(:)
       type(psb_ldspmat_type), intent(inout) :: op_prol
       type(psb_ldspmat_type), intent(out)   :: ac,op_restr
+      type(psb_desc_type), intent(inout)    :: desc_ac
       integer(psb_ipk_), intent(out)       :: info
     end subroutine mld_d_dec_aggregator_mat_bld
   end interface  
diff --git a/mlprec/mld_d_inner_mod.f90 b/mlprec/mld_d_inner_mod.f90
index 2329bf77..c36153d8 100644
--- a/mlprec/mld_d_inner_mod.f90
+++ b/mlprec/mld_d_inner_mod.f90
@@ -109,7 +109,8 @@ module mld_d_inner_mod
   end interface mld_map_to_tprol
 
   abstract interface
-    subroutine mld_daggrmat_var_bld(a,desc_a,ilaggr,nlaggr,parms,ac,op_prol,op_restr,info)
+    subroutine mld_daggrmat_var_bld(a,desc_a,ilaggr,nlaggr,parms,&
+         & ac,desc_ac,op_prol,op_restr,info)
       import :: psb_dspmat_type, psb_desc_type, psb_dpk_, psb_ipk_, psb_lpk_, psb_ldspmat_type
       import ::  mld_d_onelev_type, mld_dml_parms
       implicit none 
@@ -119,6 +120,7 @@ module mld_d_inner_mod
       type(mld_dml_parms), intent(inout)         :: parms 
       type(psb_ldspmat_type), intent(inout)        :: op_prol
       type(psb_ldspmat_type), intent(out)          :: ac,op_restr
+      type(psb_desc_type), intent(inout)       :: desc_ac
       integer(psb_ipk_), intent(out)                :: info
     end subroutine mld_daggrmat_var_bld
   end interface