diff --git a/trunk/paradiseo-peo/src/core/eoPop_mesg.h b/trunk/paradiseo-peo/src/core/eoPop_mesg.h
new file mode 100644
index 000000000..948e17ae2
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+++ b/trunk/paradiseo-peo/src/core/eoPop_mesg.h
@@ -0,0 +1,62 @@
+/* 
+* <eoPop_comm.h>
+* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
+* (C) OPAC Team, LIFL, 2002-2007
+*
+* Sebastien Cahon, Alexandru-Adrian Tantar
+*
+* This software is governed by the CeCILL license under French law and
+* abiding by the rules of distribution of free software.  You can  use,
+* modify and/ or redistribute the software under the terms of the CeCILL
+* license as circulated by CEA, CNRS and INRIA at the following URL
+* "http://www.cecill.info".
+*
+* As a counterpart to the access to the source code and  rights to copy,
+* modify and redistribute granted by the license, users are provided only
+* with a limited warranty  and the software's author,  the holder of the
+* economic rights,  and the successive licensors  have only  limited liability.
+*
+* In this respect, the user's attention is drawn to the risks associated
+* with loading,  using,  modifying and/or developing or reproducing the
+* software by the user in light of its specific status of free software,
+* that may mean  that it is complicated to manipulate,  and  that  also
+* therefore means  that it is reserved for developers  and  experienced
+* professionals having in-depth computer knowledge. Users are therefore
+* encouraged to load and test the software's suitability as regards their
+* requirements in conditions enabling the security of their systems and/or
+* data to be ensured and,  more generally, to use and operate it in the
+* same conditions as regards security.
+* The fact that you are presently reading this means that you have had
+* knowledge of the CeCILL license and that you accept its terms.
+*
+* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
+* Contact: paradiseo-help@lists.gforge.inria.fr
+*
+*/
+
+#ifndef __eoPop_mesg_h
+#define __eoPop_mesg_h
+
+#include <eoPop.h>
+
+#include "messaging.h"
+
+
+template <class EOT> void pack (const eoPop <EOT> & __pop) {
+
+  pack ((unsigned) __pop.size ());
+  for (unsigned i = 0; i < __pop.size (); i ++)
+    pack (__pop [i]);
+}
+
+template <class EOT> void unpack (eoPop <EOT> & __pop) {
+
+  unsigned n;
+
+  unpack (n);
+  __pop.resize (n);
+  for (unsigned i = 0; i < n; i ++)
+    unpack (__pop [i]);
+}
+
+#endif