diff --git a/trunk/paradiseo-peo/src/core/packUnpackeoScalarFitness.h b/trunk/paradiseo-peo/src/core/packUnpackeoScalarFitness.h
new file mode 100644
index 000000000..c8cb80b5b
--- /dev/null
+++ b/trunk/paradiseo-peo/src/core/packUnpackeoScalarFitness.h
@@ -0,0 +1,80 @@
+/*
+ C++ Interface: packUnpackeoScalarFitness
+
+(c) TAO Project Team of INRIA Saclay, 2010 Thales group
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; version 2
+    of the License.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+Contact: http://eodev.sourceforge.net
+
+Authors:
+    Mostepha-Redouane Khouadjia <mostepha-redouane.khouadjia@inria.fr>
+    Johann Dréo <johann.dreo@thalesgroup.com>
+*/
+#ifndef _packUnpackeoScalarFitness_h
+#define _packUnpackeoScalarFitness_h
+
+#include "messaging.h"
+
+#include <utility>
+#include <string>
+
+
+template <class ScalarType >
+void pack( const  eoScalarFitness  < ScalarType, std::less<ScalarType> >   & __fit ) {
+
+	ScalarType  value  = __fit;  // pack the scalar type of the fitness ( see  operator ScalarType () in <eo> )
+	
+	pack( value ); 
+	
+	}
+	
+	
+	
+	
+template <class ScalarType >
+void pack( const  eoScalarFitness  < ScalarType, std::greater<ScalarType> >   & __fit ) {
+
+	ScalarType  value  = __fit; // same as for less<ScalarType>
+	
+	pack( value ); 
+	
+	}
+	
+	
+template <class ScalarType >
+void unpack(  eoScalarFitness  < ScalarType, std::less<ScalarType> > & __fit ) {
+
+	ScalarType  value ;
+	
+	unpack( value ); 
+	
+	}
+	
+	
+	
+		
+template <class ScalarType >
+void unpack(  eoScalarFitness  < ScalarType, std::greater<ScalarType> > & __fit ) {
+
+	ScalarType  value ;
+	
+	unpack( value ); 
+	
+	}
+	
+	
+#endif	
+