"auke(a)noppe.nl" wrote : | public UserManagerBean(User user) { | | this.user = user; | | } | | i have done some debugging, and i found out that the namedQuery Users.getAllUsers works when called from another sessionbean. so i quess that there is an fault in the UserManagerBean. do you have an idea what exactly? You don't have a default constructor in your UserManagerBean. Add a default constructor to that bean and rebuild your application. Then test the changes. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4156670#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...