Hi, I am working with an old database without transaction, So I add anonymous wrote : @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED) to my sessionbean. but i get this exception anonymous wrote : EntityManager must be access within a transaction when I persist an object. If i comment the @TransactionAttribute, the persist works, But i got a anonymous wrote : javax.transaction.RollbackException after invoke the EJB method. what should i do to avoid these problems? thanks in advance liu View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4172973#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...