anonymous wrote : Caused by: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatI | d=257, GlobalId=kostja-mobil/468, BranchQual=, localId=468] status=STATUS_NO_TRANSACTION; - nested t | hrowable: (javax.persistence.EntityNotFoundException: deleted entity passed to persist: [kk.rentform | .entity.Kfz#]) | I'd start looking here. Make sure you aren't trying to persist null or an object that has been removed. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4036840#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...