diff --git a/cbind/base/Makefile b/cbind/base/Makefile
index 9d6e9814..00a5f656 100644
--- a/cbind/base/Makefile
+++ b/cbind/base/Makefile
@@ -13,10 +13,13 @@ FOBJS= psb_objhandle_mod.o psb_base_cbind_mod.o psb_cpenv_mod.o \
       psb_s_tools_cbind_mod.o  psb_s_serial_cbind_mod.o psb_s_psblas_cbind_mod.o \
       psb_d_tools_cbind_mod.o  psb_d_serial_cbind_mod.o psb_d_psblas_cbind_mod.o \
       psb_c_tools_cbind_mod.o  psb_c_serial_cbind_mod.o psb_c_psblas_cbind_mod.o \
-      psb_z_tools_cbind_mod.o  psb_z_serial_cbind_mod.o psb_z_psblas_cbind_mod.o 
+      psb_z_tools_cbind_mod.o  psb_z_serial_cbind_mod.o psb_z_psblas_cbind_mod.o \
+      psb_d_comm_cbind_mod.o
 
-COBJS= psb_c_base.o psb_c_sbase.o psb_c_dbase.o psb_c_cbase.o psb_c_zbase.o 
-CMOD=psb_base_cbind.h psb_c_base.h psb_c_sbase.h  psb_c_dbase.h  psb_c_cbase.h  psb_c_zbase.h 
+COBJS= psb_c_base.o psb_c_sbase.o psb_c_dbase.o psb_c_cbase.o psb_c_zbase.o \
+	psb_c_dcomm.o
+CMOD=psb_base_cbind.h psb_c_base.h psb_c_sbase.h  psb_c_dbase.h  psb_c_cbase.h  psb_c_zbase.h \
+	psb_c_dcomm.h
 OBJS=$(FOBJS) $(COBJS)
 
 LIBMOD=psb_base_cbind_mod$(.mod) psb_cpenv_mod$(.mod)  psb_objhandle_mod$(.mod)\
@@ -24,7 +27,9 @@ LIBMOD=psb_base_cbind_mod$(.mod) psb_cpenv_mod$(.mod)  psb_objhandle_mod$(.mod)\
        psb_s_tools_cbind_mod$(.mod) psb_s_serial_cbind_mod$(.mod) psb_s_psblas_cbind_mod$(.mod) \
        psb_d_tools_cbind_mod$(.mod) psb_d_serial_cbind_mod$(.mod) psb_d_psblas_cbind_mod$(.mod) \
        psb_c_tools_cbind_mod$(.mod) psb_c_serial_cbind_mod$(.mod) psb_c_psblas_cbind_mod$(.mod) \
-       psb_z_tools_cbind_mod$(.mod) psb_z_serial_cbind_mod$(.mod) psb_z_psblas_cbind_mod$(.mod) 
+       psb_z_tools_cbind_mod$(.mod) psb_z_serial_cbind_mod$(.mod) psb_z_psblas_cbind_mod$(.mod) \
+       psb_d_comm_cbind_mod$(.mod)
+
 LOCAL_MODS=$(LIBMOD) 
 LIBNAME=$(CBINDLIBNAME)	
 
@@ -41,7 +46,8 @@ psb_base_cbind_mod.o: psb_cpenv_mod.o psb_objhandle_mod.o psb_base_tools_cbind_m
       psb_s_tools_cbind_mod.o  psb_s_serial_cbind_mod.o psb_s_psblas_cbind_mod.o \
       psb_d_tools_cbind_mod.o  psb_d_serial_cbind_mod.o psb_d_psblas_cbind_mod.o \
       psb_c_tools_cbind_mod.o  psb_c_serial_cbind_mod.o psb_c_psblas_cbind_mod.o \
-      psb_z_tools_cbind_mod.o  psb_z_serial_cbind_mod.o psb_z_psblas_cbind_mod.o 
+      psb_z_tools_cbind_mod.o  psb_z_serial_cbind_mod.o psb_z_psblas_cbind_mod.o  \
+      psb_d_comm_cbind_mod.o
 
 psb_base_tools_cbind_mod.o: psb_objhandle_mod.o  psb_base_string_cbind_mod.o
 
@@ -50,7 +56,8 @@ psb_d_tools_cbind_mod.o psb_d_serial_cbind_mod.o \
 psb_c_tools_cbind_mod.o psb_c_serial_cbind_mod.o \
 psb_z_tools_cbind_mod.o psb_z_serial_cbind_mod.o \
 psb_s_psblas_cbind_mod.o psb_d_psblas_cbind_mod.o \
-psb_c_psblas_cbind_mod.o psb_z_psblas_cbind_mod.o: psb_base_tools_cbind_mod.o psb_objhandle_mod.o  psb_base_string_cbind_mod.o
+psb_c_psblas_cbind_mod.o psb_z_psblas_cbind_mod.o \
+psb_d_comm_cbind_mod.o : psb_base_tools_cbind_mod.o psb_objhandle_mod.o  psb_base_string_cbind_mod.o
 
 psb_base_psblas_cbind_mod.o: psb_s_psblas_cbind_mod.o psb_d_psblas_cbind_mod.o psb_c_psblas_cbind_mod.o psb_z_psblas_cbind_mod.o
 
diff --git a/cbind/base/psb_c_dcomm.c b/cbind/base/psb_c_dcomm.c
index b6d708df..2a700d18 100644
--- a/cbind/base/psb_c_dcomm.c
+++ b/cbind/base/psb_c_dcomm.c
@@ -1,4 +1,35 @@
 #include <stdlib.h>
 #include "psb_c_dcomm.h"
 
+#include <stdlib.h>
+#include "psb_c_dbase.h"
+
+
+psb_d_t* psb_c_dvgather(psb_c_dvector *xh, psb_c_descriptor *cdh)
+{ 
+  psb_d_t *temp=NULL;
+  psb_i_t vsize=0; 
+  
+  if ((vsize=psb_c_cd_get_global_rows(cdh))<0) 
+    return(temp);
+  
+  if (vsize==0) 
+    vsize=1;
+  
+  if ((temp=(psb_d_t *)malloc(vsize*sizeof(psb_d_t)))!=NULL)
+    psb_c_dvgather_f(temp,xh,cdh);
+ 
+ return(temp);
+
+}
+
+
+psb_c_dspmat* psb_c_dspgather(psb_c_dspmat *ah, psb_c_descriptor *cdh)
+{
+  psb_c_dspmat* temp=psb_c_new_dspmat();
+
+  psb_c_dspgather_f(temp, ah, cdh);
+  return(temp);
+}
+
 
diff --git a/cbind/base/psb_c_dcomm.h b/cbind/base/psb_c_dcomm.h
index 9c906117..1c78b5a1 100644
--- a/cbind/base/psb_c_dcomm.h
+++ b/cbind/base/psb_c_dcomm.h
@@ -7,12 +7,18 @@ extern "C" {
 #endif
 
   psb_i_t       psb_c_dhalo(psb_c_dvector *xh, psb_c_descriptor *cdh);
-  psb_i_t       psb_c_dhalo_opt(psb_c_dvector *xh, psb_c_descriptor *cdh);
+  psb_i_t       psb_c_dhalo_opt(psb_c_dvector *xh, psb_c_descriptor *cdh,
+				char *trans, psb_i_t mode);
   psb_i_t       psb_c_dovrl(psb_c_dvector *xh, psb_c_descriptor *cdh);
-  psb_i_t       psb_c_dovrl_opt(psb_c_dvector *xh, psb_c_descriptor *cdh);
+  psb_i_t       psb_c_dovrl_opt(psb_c_dvector *xh, psb_c_descriptor *cdh,
+				psb_i_t update, psb_i_t mode);
   psb_i_t       psb_c_dvscatter(psb_c_dvector *xh, psb_c_descriptor *cdh);
+
   psb_d_t*      psb_c_dvgather(psb_c_dvector *xh, psb_c_descriptor *cdh);
   psb_c_dspmat* psb_c_dspgather(psb_c_dspmat *ah, psb_c_descriptor *cdh);
+  
+  psb_i_t       psb_c_dvgather_f(psb_d_t* gv, psb_c_dvector *xh, psb_c_descriptor *cdh);
+  psb_i_t       psb_c_dspgather_f(psb_c_dspmat* ga, psb_c_dspmat *ah, psb_c_descriptor *cdh);
 
 
 #ifdef __cplusplus
diff --git a/cbind/base/psb_d_comm_cbind.f90 b/cbind/base/psb_d_comm_cbind.f90
new file mode 100644
index 00000000..5caec196
--- /dev/null
+++ b/cbind/base/psb_d_comm_cbind.f90
@@ -0,0 +1,74 @@
+module psb_d_comm_cbind_mod
+  use iso_c_binding
+  use psb_base_mod
+  use psb_objhandle_mod
+  use psb_base_string_cbind_mod
+  use psb_base_tools_cbind_mod 
+
+contains
+
+  
+  function psb_c_dvgather_f(v,xh,cdh) bind(c) result(res)
+    implicit none 
+
+    integer(psb_c_int)    :: res   
+    real(c_double)    :: v(*)
+    type(psb_c_dvector) :: xh
+    type(psb_c_descriptor) :: cdh
+    
+    type(psb_desc_type), pointer :: descp
+    type(psb_d_vect_type), pointer :: vp
+    real(psb_dpk_), allocatable :: fv(:)
+    integer               :: info, sz
+
+    res = -1
+
+    if (c_associated(cdh%item)) then 
+      call c_f_pointer(cdh%item,descp)
+    else
+      return 
+    end if
+    if (c_associated(xh%item)) then 
+      call c_f_pointer(xh%item,vp)
+      call psb_gather(fv,vp,descp,info)
+      res = info 
+      if (res /=0) return          
+      sz = size(fv)
+      v(1:sz) = fv(1:sz)
+    end if
+  end function psb_c_dvgather_f
+    
+  function psb_c_dspgather_f(gah,ah,cdh) bind(c) result(res)
+    implicit none 
+
+    integer(psb_c_int)    :: res   
+    type(psb_c_dspmat)   :: ah, gah
+    type(psb_c_descriptor) :: cdh
+    
+    type(psb_desc_type), pointer :: descp
+    type(psb_dspmat_type), pointer :: ap, gap
+    integer               :: info, sz
+
+    res = -1
+    if (c_associated(cdh%item)) then 
+      call c_f_pointer(cdh%item,descp)
+    else
+      return 
+    end if
+    if (c_associated(ah%item)) then 
+      call c_f_pointer(ah%item,ap)
+    else
+      return 
+    end if
+    if (c_associated(gah%item)) then 
+      call c_f_pointer(gah%item,gap)
+    else
+      return 
+    end if
+    call psb_gather(gap,ap,descp,info)
+    res = info 
+  end function psb_c_dspgather_f
+    
+  
+end module psb_d_comm_cbind_mod
+