I don't use jBPM, I use EJB3-RC9 directly. I have the same exception in some cases with code which worked previously. Seems like "instance not of expected entity type" drops transaction somehow. The exception is thrown in some place in code which does not throw an exception in some cases and throws when called in slightly other way. Is this javaassist porblem or EJB3? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3973388#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...