I found where it comes from ... My employeList seam component, which contains the employees list, was in CONVERSATION scope. So I think that the conversation was ended when running employeCrud component and of course it could not find the employee in the list ;) I set my employeList component to SESSION scope and now it works better (other errors, but it goes further and this new error has nothing to see) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4068649#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...