diff --git a/openerp/addons/base/res/res_bank.py b/openerp/addons/base/res/res_bank.py
index c9010b64319..3ef9188475f 100644
--- a/openerp/addons/base/res/res_bank.py
+++ b/openerp/addons/base/res/res_bank.py
@@ -190,7 +190,7 @@ class res_partner_bank(osv.osv):
                         result = t.format_layout % val._data[val.id]
                     except:
                         result += ' [Formatting Error]'
-                        raise
+                        raise osv.except_osv(_("Warning"), _("You cannot avoid default format_layout to result in True"))
             res.append((val.id, result))
         return res