get the rank and not the index for process creation

[simgrid.git] / src / smpi / smpi_pmpi.c

diff --git a/src/smpi/smpi_pmpi.c b/src/smpi/smpi_pmpi.c
index b034aaf..8765cf7 100644 (file)
--- a/src/smpi/smpi_pmpi.c
+++ b/src/smpi/smpi_pmpi.c
@@ -792,7 +792,11 @@ int PMPI_Comm_create(MPI_Comm comm, MPI_Group group, MPI_Comm * newcomm)
     retval = MPI_ERR_GROUP;
   } else if (newcomm == NULL) {
     retval = MPI_ERR_ARG;
-  } else {
+  } else if(smpi_group_rank(group,smpi_process_index())==MPI_UNDEFINED){
+    *newcomm= MPI_COMM_NULL;
+    retval = MPI_SUCCESS;
+  }else{
+
     *newcomm = smpi_comm_new(group);
     retval = MPI_SUCCESS;
   }