I've seen similar exceptions when hot-redeploying jbpm-bpel.sar. Clearly a bug, but I have to investigate. This would explain that it works on other machines if you don't redeploy the .sar there. Note that the above issue does not affect the ability to redeploy .wars for individual processes, which is what you want to do most the times. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3967082#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...