Thanks Jamie, I think we have slightly different problems (although possibly/ probably related). I am deploying on JBoss AS 4.2.1.GA and my processes manage to complete successfully, as long as I do not use jbpm timers. My problem occurs when a jbpm timer fires and then I think it trys to commit the transaction but fails, leaving the workflow in an unfinished state. Unfortunately, I cannot comment out: | <service name="scheduler" factory="org.jbpm.scheduler.db.DbSchedulerServiceFactory" /> | because jbpm requires this to actually create the timers. I'd be interested (and not just a little bit grateful) to hear what any of the JBoss team make of this problem? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4104912#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...