christian thanx for the clarification. i will try your proposal of explicitely calling joinTransaction, but i expect it to work :) still it is kind of confusing to me as it is working perfectly for the @PersistenceContext inject entityManager. i conclude that this one is joining the transaction auto-magically ???? i'm wondering what the rationale is for not having the seam managed entityManager auto-magically join the user transaction ? ( and have a different behaviour than the EJB3 inject persitenceContext) thanx for any clarification or rationale koen View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4090206#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...