There is something important I forgot to say in that conclusion above: MAKE IT SERIALIZABLE ;) I did not succeed in running a Seam component converter with an EntityManager in it without making the class serializable. And I tried all combinations of scopes and interceptors. But that is something which is important for all your Seam Component or EJBs. Everything needs to be serializable. And if your bean has properties that do not implement Serializable, make them transient! Just for the sake of completeness :). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3966659#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...