Hi, actually it did not help. Like stated at http://www.jboss.com/index.html?module=bb&op=viewtopic&t=108409, since 2 threads are in game: JMS and JBPM then will join the race, so sometimes it will pass, sometimes won't. Actually that made a big problem to me, so I would strongly advice to either use XA transactions like mentioned or to redesign process and avoid using JMS, which I did at the end. Regards Milan View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048174#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...