could also be caused by a wrong dialect (afair, I've had the same thing before once, though not jBPM related) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4241839#4241839 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4241839