Hi, There's nobody to help me ? I don't know Hibernate very well and I don't really know what to do. If I patch jBPM commenting the line marked //--4 on my precedent post (this make the error message disappear), do you think I'll get trouble somewhere else ? Is this the solution ? Is there another way to avoid the message (modifying configuration) ? Regards A. ROY View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4070429#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...