Hello, I just pushed a few minuts ago a patch that will have Koha raise an error message when there is a mySQL error. All developers should activate this in their staff & OPAC virtual hosts. Thus if there are errors, they'll be displayed & visible. Please have a look at http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=7184 to get details ! -- Paul POULAIN http://www.biblibre.com Expert en Logiciels Libres pour l'info-doc Tel : (33) 4 91 81 35 08