Try setting fetchPersistentState to false, with the JDBC CL and see if you have the error. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4206918#4206918 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4206918