[jboss-user] [JBoss Seam] - detached entity passed to persist

Hello Folks! in the examples it looks all so easy, but i still dont get it right. What are the possible reasons for this exception to occur? javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist I dont call em.persist nor em.merge or anything. i just want to edit that @DataModelSelection annotated entity in a form and have it persisted. I saw at least two possible solutions to get the right object: @DataModelSelection Entity selectedEntity; in the booking example HotelBookingAction.java: | @In(required=false) @Out | private Hotel hotel; | | | @Begin | public void selectHotel(Hotel selectedHotel) | { | hotel = em.merge(selectedHotel); | } | however both of these option lead to the same error. So again: what are the reasons for the PersistentObjectException to occur? Thanks for any hints. Tobias Kilian PS: i know this is ejb stuff, so perhaps i should ask there? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4040580#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...