Upgrading to jBPM 3.2.1 seems to fix this issue. Thanks for your help. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4066846#4066846 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4066846