diff --git a/mlprec/impl/level/mld_c_base_onelev_build.f90 b/mlprec/impl/level/mld_c_base_onelev_build.f90
index 199582d1..587bdb1c 100644
--- a/mlprec/impl/level/mld_c_base_onelev_build.f90
+++ b/mlprec/impl/level/mld_c_base_onelev_build.f90
@@ -93,30 +93,51 @@ subroutine mld_c_base_onelev_build(lv,info,amold,vmold,imold)
        & 'Jacobi sweeps',izero,is_int_non_negative)
   call mld_check_def(lv%parms%sweeps_post,&
        & 'Jacobi sweeps',izero,is_int_non_negative)
-
-  call lv%sm%build(lv%base_a,lv%base_desc,&
-       & info,amold=amold,vmold=vmold,imold=imold)
-  if (info == 0) then
-    if (allocated(lv%sm2a)) then 
-      call lv%sm2a%build(lv%base_a,lv%base_desc,info,&
-           & amold=amold,vmold=vmold,imold=imold)
-      lv%sm2 => lv%sm2a
-    else
-      lv%sm2 => lv%sm
+  
+  if (.false.) then 
+    call lv%sm%build(lv%base_a,lv%base_desc,&
+         & info,amold=amold,vmold=vmold,imold=imold)
+    if (info == 0) then
+      if (allocated(lv%sm2a)) then 
+        call lv%sm2a%build(lv%base_a,lv%base_desc,info,&
+             & amold=amold,vmold=vmold,imold=imold)
+        lv%sm2 => lv%sm2a
+      else
+        lv%sm2 => lv%sm
+      end if
+    end if
+    if (info /=0) then
+      info = psb_err_internal_error_
+      call psb_errpush(info,name,&
+           & a_err='Smoother bld error')
+      goto 9999
+    end if
+  else  
+    call lv%sm%build(lv%base_a,lv%base_desc,info)
+    if (info == 0) then
+      if (allocated(lv%sm2a)) then 
+        call lv%sm2a%build(lv%base_a,lv%base_desc,info)
+        lv%sm2 => lv%sm2a
+      else
+        lv%sm2 => lv%sm
+      end if
+    end if
+    if (info /=0 ) then
+      info = psb_err_internal_error_
+      call psb_errpush(info,name,&
+           & a_err='Smoother bld error')
+      goto 9999
     end if
-  end if
-  if (info /=0) then
-    info = psb_err_internal_error_
-    call psb_errpush(info,name,&
-         & a_err='Smoother bld error')
-    goto 9999
-  end if
 
+    if (any((/present(amold),present(vmold),present(imold)/))) &
+         & call lv%cnv(info,amold=amold,vmold=vmold,imold=imold)
+  end if
+    
   call psb_erractionrestore(err_act)
   return
-
+  
 9999 call psb_error_handler(err_act)
-
+  
   return
-
+  
 end subroutine mld_c_base_onelev_build
diff --git a/mlprec/impl/level/mld_c_base_onelev_cnv.f90 b/mlprec/impl/level/mld_c_base_onelev_cnv.f90
index 9d71c74e..2b57fd13 100644
--- a/mlprec/impl/level/mld_c_base_onelev_cnv.f90
+++ b/mlprec/impl/level/mld_c_base_onelev_cnv.f90
@@ -54,10 +54,14 @@ subroutine mld_c_base_onelev_cnv(lv,info,amold,vmold,imold)
   if (any((/present(amold),present(vmold),present(imold)/))) then 
     if (allocated(lv%sm)) &
          & call lv%sm%cnv(info,amold=amold,vmold=vmold,imold=imold)
+    if (info == psb_success_ .and. allocated(lv%sm2a)) &
+         & call lv%sm2a%cnv(info,amold=amold,vmold=vmold,imold=imold)
+    if (info == psb_success_ .and. allocated(lv%wrk)) &
+         & call lv%wrk(vmold=vmold)
     if (info == psb_success_.and. lv%ac%is_asb()) &
          & call lv%ac%cscnv(info,mold=amold)
-    if (info == psb_success_ .and. lv%desc_ac%is_ok()) &
-         & call lv%desc_ac%cnv(imold)
+    if (info == psb_success_ .and. lv%desc_ac%is_ok() &
+         & .and. present(imold)) call lv%desc_ac%cnv(imold)
     call lv%map%cnv(info,mold=amold,imold=imold)
   end if
 end subroutine mld_c_base_onelev_cnv
diff --git a/mlprec/impl/level/mld_d_base_onelev_build.f90 b/mlprec/impl/level/mld_d_base_onelev_build.f90
index 796d0b72..1fe9c11d 100644
--- a/mlprec/impl/level/mld_d_base_onelev_build.f90
+++ b/mlprec/impl/level/mld_d_base_onelev_build.f90
@@ -93,30 +93,51 @@ subroutine mld_d_base_onelev_build(lv,info,amold,vmold,imold)
        & 'Jacobi sweeps',izero,is_int_non_negative)
   call mld_check_def(lv%parms%sweeps_post,&
        & 'Jacobi sweeps',izero,is_int_non_negative)
-
-  call lv%sm%build(lv%base_a,lv%base_desc,&
-       & info,amold=amold,vmold=vmold,imold=imold)
-  if (info == 0) then
-    if (allocated(lv%sm2a)) then 
-      call lv%sm2a%build(lv%base_a,lv%base_desc,info,&
-           & amold=amold,vmold=vmold,imold=imold)
-      lv%sm2 => lv%sm2a
-    else
-      lv%sm2 => lv%sm
+  
+  if (.false.) then 
+    call lv%sm%build(lv%base_a,lv%base_desc,&
+         & info,amold=amold,vmold=vmold,imold=imold)
+    if (info == 0) then
+      if (allocated(lv%sm2a)) then 
+        call lv%sm2a%build(lv%base_a,lv%base_desc,info,&
+             & amold=amold,vmold=vmold,imold=imold)
+        lv%sm2 => lv%sm2a
+      else
+        lv%sm2 => lv%sm
+      end if
+    end if
+    if (info /=0) then
+      info = psb_err_internal_error_
+      call psb_errpush(info,name,&
+           & a_err='Smoother bld error')
+      goto 9999
+    end if
+  else  
+    call lv%sm%build(lv%base_a,lv%base_desc,info)
+    if (info == 0) then
+      if (allocated(lv%sm2a)) then 
+        call lv%sm2a%build(lv%base_a,lv%base_desc,info)
+        lv%sm2 => lv%sm2a
+      else
+        lv%sm2 => lv%sm
+      end if
+    end if
+    if (info /=0 ) then
+      info = psb_err_internal_error_
+      call psb_errpush(info,name,&
+           & a_err='Smoother bld error')
+      goto 9999
     end if
-  end if
-  if (info /=0) then
-    info = psb_err_internal_error_
-    call psb_errpush(info,name,&
-         & a_err='Smoother bld error')
-    goto 9999
-  end if
 
+    if (any((/present(amold),present(vmold),present(imold)/))) &
+         & call lv%cnv(info,amold=amold,vmold=vmold,imold=imold)
+  end if
+    
   call psb_erractionrestore(err_act)
   return
-
+  
 9999 call psb_error_handler(err_act)
-
+  
   return
-
+  
 end subroutine mld_d_base_onelev_build
diff --git a/mlprec/impl/level/mld_d_base_onelev_cnv.f90 b/mlprec/impl/level/mld_d_base_onelev_cnv.f90
index 9df25328..834e004d 100644
--- a/mlprec/impl/level/mld_d_base_onelev_cnv.f90
+++ b/mlprec/impl/level/mld_d_base_onelev_cnv.f90
@@ -54,10 +54,14 @@ subroutine mld_d_base_onelev_cnv(lv,info,amold,vmold,imold)
   if (any((/present(amold),present(vmold),present(imold)/))) then 
     if (allocated(lv%sm)) &
          & call lv%sm%cnv(info,amold=amold,vmold=vmold,imold=imold)
+    if (info == psb_success_ .and. allocated(lv%sm2a)) &
+         & call lv%sm2a%cnv(info,amold=amold,vmold=vmold,imold=imold)
+    if (info == psb_success_ .and. allocated(lv%wrk)) &
+         & call lv%wrk(vmold=vmold)
     if (info == psb_success_.and. lv%ac%is_asb()) &
          & call lv%ac%cscnv(info,mold=amold)
-    if (info == psb_success_ .and. lv%desc_ac%is_ok()) &
-         & call lv%desc_ac%cnv(imold)
+    if (info == psb_success_ .and. lv%desc_ac%is_ok() &
+         & .and. present(imold)) call lv%desc_ac%cnv(imold)
     call lv%map%cnv(info,mold=amold,imold=imold)
   end if
 end subroutine mld_d_base_onelev_cnv
diff --git a/mlprec/impl/level/mld_s_base_onelev_build.f90 b/mlprec/impl/level/mld_s_base_onelev_build.f90
index 774a39b0..a2c9fff4 100644
--- a/mlprec/impl/level/mld_s_base_onelev_build.f90
+++ b/mlprec/impl/level/mld_s_base_onelev_build.f90
@@ -93,30 +93,51 @@ subroutine mld_s_base_onelev_build(lv,info,amold,vmold,imold)
        & 'Jacobi sweeps',izero,is_int_non_negative)
   call mld_check_def(lv%parms%sweeps_post,&
        & 'Jacobi sweeps',izero,is_int_non_negative)
-
-  call lv%sm%build(lv%base_a,lv%base_desc,&
-       & info,amold=amold,vmold=vmold,imold=imold)
-  if (info == 0) then
-    if (allocated(lv%sm2a)) then 
-      call lv%sm2a%build(lv%base_a,lv%base_desc,info,&
-           & amold=amold,vmold=vmold,imold=imold)
-      lv%sm2 => lv%sm2a
-    else
-      lv%sm2 => lv%sm
+  
+  if (.false.) then 
+    call lv%sm%build(lv%base_a,lv%base_desc,&
+         & info,amold=amold,vmold=vmold,imold=imold)
+    if (info == 0) then
+      if (allocated(lv%sm2a)) then 
+        call lv%sm2a%build(lv%base_a,lv%base_desc,info,&
+             & amold=amold,vmold=vmold,imold=imold)
+        lv%sm2 => lv%sm2a
+      else
+        lv%sm2 => lv%sm
+      end if
+    end if
+    if (info /=0) then
+      info = psb_err_internal_error_
+      call psb_errpush(info,name,&
+           & a_err='Smoother bld error')
+      goto 9999
+    end if
+  else  
+    call lv%sm%build(lv%base_a,lv%base_desc,info)
+    if (info == 0) then
+      if (allocated(lv%sm2a)) then 
+        call lv%sm2a%build(lv%base_a,lv%base_desc,info)
+        lv%sm2 => lv%sm2a
+      else
+        lv%sm2 => lv%sm
+      end if
+    end if
+    if (info /=0 ) then
+      info = psb_err_internal_error_
+      call psb_errpush(info,name,&
+           & a_err='Smoother bld error')
+      goto 9999
     end if
-  end if
-  if (info /=0) then
-    info = psb_err_internal_error_
-    call psb_errpush(info,name,&
-         & a_err='Smoother bld error')
-    goto 9999
-  end if
 
+    if (any((/present(amold),present(vmold),present(imold)/))) &
+         & call lv%cnv(info,amold=amold,vmold=vmold,imold=imold)
+  end if
+    
   call psb_erractionrestore(err_act)
   return
-
+  
 9999 call psb_error_handler(err_act)
-
+  
   return
-
+  
 end subroutine mld_s_base_onelev_build
diff --git a/mlprec/impl/level/mld_s_base_onelev_cnv.f90 b/mlprec/impl/level/mld_s_base_onelev_cnv.f90
index c4021e92..652b2c5c 100644
--- a/mlprec/impl/level/mld_s_base_onelev_cnv.f90
+++ b/mlprec/impl/level/mld_s_base_onelev_cnv.f90
@@ -54,10 +54,14 @@ subroutine mld_s_base_onelev_cnv(lv,info,amold,vmold,imold)
   if (any((/present(amold),present(vmold),present(imold)/))) then 
     if (allocated(lv%sm)) &
          & call lv%sm%cnv(info,amold=amold,vmold=vmold,imold=imold)
+    if (info == psb_success_ .and. allocated(lv%sm2a)) &
+         & call lv%sm2a%cnv(info,amold=amold,vmold=vmold,imold=imold)
+    if (info == psb_success_ .and. allocated(lv%wrk)) &
+         & call lv%wrk(vmold=vmold)
     if (info == psb_success_.and. lv%ac%is_asb()) &
          & call lv%ac%cscnv(info,mold=amold)
-    if (info == psb_success_ .and. lv%desc_ac%is_ok()) &
-         & call lv%desc_ac%cnv(imold)
+    if (info == psb_success_ .and. lv%desc_ac%is_ok() &
+         & .and. present(imold)) call lv%desc_ac%cnv(imold)
     call lv%map%cnv(info,mold=amold,imold=imold)
   end if
 end subroutine mld_s_base_onelev_cnv
diff --git a/mlprec/impl/level/mld_z_base_onelev_build.f90 b/mlprec/impl/level/mld_z_base_onelev_build.f90
index 63bb0f9c..2994f768 100644
--- a/mlprec/impl/level/mld_z_base_onelev_build.f90
+++ b/mlprec/impl/level/mld_z_base_onelev_build.f90
@@ -93,30 +93,51 @@ subroutine mld_z_base_onelev_build(lv,info,amold,vmold,imold)
        & 'Jacobi sweeps',izero,is_int_non_negative)
   call mld_check_def(lv%parms%sweeps_post,&
        & 'Jacobi sweeps',izero,is_int_non_negative)
-
-  call lv%sm%build(lv%base_a,lv%base_desc,&
-       & info,amold=amold,vmold=vmold,imold=imold)
-  if (info == 0) then
-    if (allocated(lv%sm2a)) then 
-      call lv%sm2a%build(lv%base_a,lv%base_desc,info,&
-           & amold=amold,vmold=vmold,imold=imold)
-      lv%sm2 => lv%sm2a
-    else
-      lv%sm2 => lv%sm
+  
+  if (.false.) then 
+    call lv%sm%build(lv%base_a,lv%base_desc,&
+         & info,amold=amold,vmold=vmold,imold=imold)
+    if (info == 0) then
+      if (allocated(lv%sm2a)) then 
+        call lv%sm2a%build(lv%base_a,lv%base_desc,info,&
+             & amold=amold,vmold=vmold,imold=imold)
+        lv%sm2 => lv%sm2a
+      else
+        lv%sm2 => lv%sm
+      end if
+    end if
+    if (info /=0) then
+      info = psb_err_internal_error_
+      call psb_errpush(info,name,&
+           & a_err='Smoother bld error')
+      goto 9999
+    end if
+  else  
+    call lv%sm%build(lv%base_a,lv%base_desc,info)
+    if (info == 0) then
+      if (allocated(lv%sm2a)) then 
+        call lv%sm2a%build(lv%base_a,lv%base_desc,info)
+        lv%sm2 => lv%sm2a
+      else
+        lv%sm2 => lv%sm
+      end if
+    end if
+    if (info /=0 ) then
+      info = psb_err_internal_error_
+      call psb_errpush(info,name,&
+           & a_err='Smoother bld error')
+      goto 9999
     end if
-  end if
-  if (info /=0) then
-    info = psb_err_internal_error_
-    call psb_errpush(info,name,&
-         & a_err='Smoother bld error')
-    goto 9999
-  end if
 
+    if (any((/present(amold),present(vmold),present(imold)/))) &
+         & call lv%cnv(info,amold=amold,vmold=vmold,imold=imold)
+  end if
+    
   call psb_erractionrestore(err_act)
   return
-
+  
 9999 call psb_error_handler(err_act)
-
+  
   return
-
+  
 end subroutine mld_z_base_onelev_build
diff --git a/mlprec/impl/level/mld_z_base_onelev_cnv.f90 b/mlprec/impl/level/mld_z_base_onelev_cnv.f90
index 8e3d3ad3..5ac99b99 100644
--- a/mlprec/impl/level/mld_z_base_onelev_cnv.f90
+++ b/mlprec/impl/level/mld_z_base_onelev_cnv.f90
@@ -54,10 +54,14 @@ subroutine mld_z_base_onelev_cnv(lv,info,amold,vmold,imold)
   if (any((/present(amold),present(vmold),present(imold)/))) then 
     if (allocated(lv%sm)) &
          & call lv%sm%cnv(info,amold=amold,vmold=vmold,imold=imold)
+    if (info == psb_success_ .and. allocated(lv%sm2a)) &
+         & call lv%sm2a%cnv(info,amold=amold,vmold=vmold,imold=imold)
+    if (info == psb_success_ .and. allocated(lv%wrk)) &
+         & call lv%wrk(vmold=vmold)
     if (info == psb_success_.and. lv%ac%is_asb()) &
          & call lv%ac%cscnv(info,mold=amold)
-    if (info == psb_success_ .and. lv%desc_ac%is_ok()) &
-         & call lv%desc_ac%cnv(imold)
+    if (info == psb_success_ .and. lv%desc_ac%is_ok() &
+         & .and. present(imold)) call lv%desc_ac%cnv(imold)
     call lv%map%cnv(info,mold=amold,imold=imold)
   end if
 end subroutine mld_z_base_onelev_cnv
diff --git a/mlprec/mld_c_onelev_mod.f90 b/mlprec/mld_c_onelev_mod.f90
index 3035d30f..55548ce7 100644
--- a/mlprec/mld_c_onelev_mod.f90
+++ b/mlprec/mld_c_onelev_mod.f90
@@ -130,9 +130,10 @@ module mld_c_onelev_mod
     procedure, pass(wk) :: free       => c_wrk_free
     procedure, pass(wk) :: clone      => c_wrk_clone
     procedure, pass(wk) :: move_alloc => c_wrk_move_alloc
+    procedure, pass(wk) :: cnv        => c_wrk_cnv
   end type mld_cmlprec_wrk_type
   private :: c_wrk_alloc, c_wrk_free, &
-       & c_wrk_clone, c_wrk_move_alloc
+       & c_wrk_clone, c_wrk_move_alloc, c_wrk_cnv
   
   type mld_c_onelev_type
     class(mld_c_base_smoother_type), allocatable :: sm, sm2a
@@ -730,4 +731,30 @@ contains
         
   end subroutine c_wrk_move_alloc
 
+  subroutine c_wrk_cnv(wk,info,vmold)
+    use psb_base_mod
+    
+    Implicit None
+    
+    ! Arguments
+    class(mld_cmlprec_wrk_type), target, intent(inout) :: wk
+    integer(psb_ipk_), intent(out)                    :: info 
+    class(psb_c_base_vect_type), intent(in), optional  :: vmold
+    !
+    integer(psb_ipk_) :: i
+
+    info = psb_success_
+    if (present(vmold)) then
+      call wk%vtx%cnv(vmold)
+      call wk%vty%cnv(vmold)
+      call wk%vx2l%cnv(vmold)
+      call wk%vy2l%cnv(vmold)
+      if (allocated(wk%wv)) then
+        do i=1,size(wk%wv)
+          call wk%wv(i)%cnv(vmold)
+        end do
+      end if
+    end if
+  end subroutine c_wrk_cnv
+  
 end module mld_c_onelev_mod
diff --git a/mlprec/mld_d_onelev_mod.f90 b/mlprec/mld_d_onelev_mod.f90
index e8223c68..9461d6f2 100644
--- a/mlprec/mld_d_onelev_mod.f90
+++ b/mlprec/mld_d_onelev_mod.f90
@@ -130,9 +130,10 @@ module mld_d_onelev_mod
     procedure, pass(wk) :: free       => d_wrk_free
     procedure, pass(wk) :: clone      => d_wrk_clone
     procedure, pass(wk) :: move_alloc => d_wrk_move_alloc
+    procedure, pass(wk) :: cnv        => d_wrk_cnv
   end type mld_dmlprec_wrk_type
   private :: d_wrk_alloc, d_wrk_free, &
-       & d_wrk_clone, d_wrk_move_alloc
+       & d_wrk_clone, d_wrk_move_alloc, d_wrk_cnv
   
   type mld_d_onelev_type
     class(mld_d_base_smoother_type), allocatable :: sm, sm2a
@@ -730,4 +731,30 @@ contains
         
   end subroutine d_wrk_move_alloc
 
+  subroutine d_wrk_cnv(wk,info,vmold)
+    use psb_base_mod
+    
+    Implicit None
+    
+    ! Arguments
+    class(mld_dmlprec_wrk_type), target, intent(inout) :: wk
+    integer(psb_ipk_), intent(out)                    :: info 
+    class(psb_d_base_vect_type), intent(in), optional  :: vmold
+    !
+    integer(psb_ipk_) :: i
+
+    info = psb_success_
+    if (present(vmold)) then
+      call wk%vtx%cnv(vmold)
+      call wk%vty%cnv(vmold)
+      call wk%vx2l%cnv(vmold)
+      call wk%vy2l%cnv(vmold)
+      if (allocated(wk%wv)) then
+        do i=1,size(wk%wv)
+          call wk%wv(i)%cnv(vmold)
+        end do
+      end if
+    end if
+  end subroutine d_wrk_cnv
+  
 end module mld_d_onelev_mod
diff --git a/mlprec/mld_s_onelev_mod.f90 b/mlprec/mld_s_onelev_mod.f90
index 85317faa..74559935 100644
--- a/mlprec/mld_s_onelev_mod.f90
+++ b/mlprec/mld_s_onelev_mod.f90
@@ -130,9 +130,10 @@ module mld_s_onelev_mod
     procedure, pass(wk) :: free       => s_wrk_free
     procedure, pass(wk) :: clone      => s_wrk_clone
     procedure, pass(wk) :: move_alloc => s_wrk_move_alloc
+    procedure, pass(wk) :: cnv        => s_wrk_cnv
   end type mld_smlprec_wrk_type
   private :: s_wrk_alloc, s_wrk_free, &
-       & s_wrk_clone, s_wrk_move_alloc
+       & s_wrk_clone, s_wrk_move_alloc, s_wrk_cnv
   
   type mld_s_onelev_type
     class(mld_s_base_smoother_type), allocatable :: sm, sm2a
@@ -730,4 +731,30 @@ contains
         
   end subroutine s_wrk_move_alloc
 
+  subroutine s_wrk_cnv(wk,info,vmold)
+    use psb_base_mod
+    
+    Implicit None
+    
+    ! Arguments
+    class(mld_smlprec_wrk_type), target, intent(inout) :: wk
+    integer(psb_ipk_), intent(out)                    :: info 
+    class(psb_s_base_vect_type), intent(in), optional  :: vmold
+    !
+    integer(psb_ipk_) :: i
+
+    info = psb_success_
+    if (present(vmold)) then
+      call wk%vtx%cnv(vmold)
+      call wk%vty%cnv(vmold)
+      call wk%vx2l%cnv(vmold)
+      call wk%vy2l%cnv(vmold)
+      if (allocated(wk%wv)) then
+        do i=1,size(wk%wv)
+          call wk%wv(i)%cnv(vmold)
+        end do
+      end if
+    end if
+  end subroutine s_wrk_cnv
+  
 end module mld_s_onelev_mod
diff --git a/mlprec/mld_z_onelev_mod.f90 b/mlprec/mld_z_onelev_mod.f90
index f6d14102..b2c8e6cb 100644
--- a/mlprec/mld_z_onelev_mod.f90
+++ b/mlprec/mld_z_onelev_mod.f90
@@ -130,9 +130,10 @@ module mld_z_onelev_mod
     procedure, pass(wk) :: free       => z_wrk_free
     procedure, pass(wk) :: clone      => z_wrk_clone
     procedure, pass(wk) :: move_alloc => z_wrk_move_alloc
+    procedure, pass(wk) :: cnv        => z_wrk_cnv
   end type mld_zmlprec_wrk_type
   private :: z_wrk_alloc, z_wrk_free, &
-       & z_wrk_clone, z_wrk_move_alloc
+       & z_wrk_clone, z_wrk_move_alloc, z_wrk_cnv
   
   type mld_z_onelev_type
     class(mld_z_base_smoother_type), allocatable :: sm, sm2a
@@ -730,4 +731,30 @@ contains
         
   end subroutine z_wrk_move_alloc
 
+  subroutine z_wrk_cnv(wk,info,vmold)
+    use psb_base_mod
+    
+    Implicit None
+    
+    ! Arguments
+    class(mld_zmlprec_wrk_type), target, intent(inout) :: wk
+    integer(psb_ipk_), intent(out)                    :: info 
+    class(psb_z_base_vect_type), intent(in), optional  :: vmold
+    !
+    integer(psb_ipk_) :: i
+
+    info = psb_success_
+    if (present(vmold)) then
+      call wk%vtx%cnv(vmold)
+      call wk%vty%cnv(vmold)
+      call wk%vx2l%cnv(vmold)
+      call wk%vy2l%cnv(vmold)
+      if (allocated(wk%wv)) then
+        do i=1,size(wk%wv)
+          call wk%wv(i)%cnv(vmold)
+        end do
+      end if
+    end if
+  end subroutine z_wrk_cnv
+  
 end module mld_z_onelev_mod