Hi NULL is used in different part of the doc, usually in examples, but it is never defined, nor noted. Is it obsolete value, or does this still exist? If it does, I think we should add it in the constant.xml file. If it doesn't, some examples are to be modified. Is it NULL == 0? Best regards, Damien Seguy ==================================== http://www.nexen.net/ l'hebergement dynamique ! Docs PHP/MySQL en Francais, scripts ====================================