Hum, changing the TransactionFactory from CMT to JTA did not solve the problem, but setting isCurrentSessionEnabled to false in jbpm.cfg.xml did !!!!! Tom, you probably want to check with the Hibernate guys on this; my understanding is that if you invoked getCurrentSession and there was none, hibernate would create a session for you. Somehow if it is creating it, it is not creating a transaction along with it. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4003085#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...