Hello! I can't really help you but I have a similar problem. Somewehre in this forum I have read that it does not work if the ejbs are in different persistence-units. I have two jars, too, but I use the same persistence.xml in both jars, so I think I should have the same persistence-unit for the ejbs in both jars. Anyway I get the error message "...references an unknown entity...". Is there a workaround for this problem? Achim View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3970556#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...