X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/0e9c0448c6566825b170b98ecff716b098bda10e..4bb593c5dd46c9fa83345dc65903620c917317df:/src/smpi/colls/allgather-2dmesh.c

diff --git a/src/smpi/colls/allgather-2dmesh.c b/src/smpi/colls/allgather-2dmesh.c
index 602d540e11..6bec72d967 100644
--- a/src/smpi/colls/allgather-2dmesh.c
+++ b/src/smpi/colls/allgather-2dmesh.c
@@ -1,3 +1,9 @@
+/* Copyright (c) 2013-2014. The SimGrid Team.
+ * All rights reserved.                                                     */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
 #include "colls_private.h"
 
 /*****************************************************************************
@@ -120,7 +126,7 @@ smpi_coll_tuned_allgather_2dmesh(void *send_buff, int send_count, MPI_Datatype
   block_size = extent * send_count;
 
   if (!is_2dmesh(num_procs, &X, &Y))
-    return MPI_ERR_COMM;
+    THROWF(arg_error,0, "allgather_2dmesh algorithm can't be used with this number of processes! ");
 
   my_row_base = (rank / Y) * Y;
   my_col_base = rank % Y;