diff --git a/gestion/affich_tools.py b/gestion/affich_tools.py
index 9f7c4328..d0d37f77 100755
--- a/gestion/affich_tools.py
+++ b/gestion/affich_tools.py
@@ -187,7 +187,11 @@ def tableau(data, titre=None, largeur=None, alignement=None, format=None, dialog
 
     def reformate(data, format):
         if format == 's':
-            return unicode(data)
+            try:
+                return unicode(data)
+            except:
+                sys.stderr.write("Cannot cast to unicode %r\n" % data)
+                return unicode(data, errors='ignore')
 
         elif format == 'o' :
             data = float(data)