If you are using @In then you need to configure JPA http://docs.jboss.com/seam/1.2.1.GA/reference/en/html/persistence.html#d0... It means that seam will manage your EntityManager and you will just inject it. Benefit of that is that you actualy use one EntityManager in side conversation, it is a great thing if you need to span one "hiberante session" between many actionBeans beacuse you than you do not have to merge things in side your context when you whant to persist them and so on it is truly session per conversation pattern, great thing I love it. On the other hand if you use @PersistenceContext than it is EJB stuff and and EntityManager is unique for on ActionBean only. I was confused about that to maybe this van help also http://www.jboss.com/index.html?module=bb&op=viewtopic&t=106004 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4035680#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...