Even if I try to have the ActionHandler it throws the same exception. Is it a issue with the jbpm3.2.3 version View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4218875#4218875 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4218875