Hi Volker Unfortunately, your hack doesn't work, I got a more serious exception: | 17:41:04,598 ERROR [AssertionFailure] an assertion failure occured (this may indicate a bug in Hiber | nate, but is more likely due to unsafe use of the session) | org.hibernate.AssertionFailure: possible nonthreadsafe access to session | at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:64) | at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279) | at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263) | at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167) | at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingE | ventListener.java:298) | at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java: | 27) | View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4224279#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...