No idea. It could be part of the EJB3 spec. Just add the 'implements' clause to your class. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4033093#4033093 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4033093