uhhmm... by saving the action? Learn a little how hibernate works. Lots of info on this (very generic) hibernate error. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3962311#3962311 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3962311