'simple is relative' You have to find the primary key of the old and new tasknode and update the reference in task in the running instance. You'd have to do this for all the nodes. otoh, you can try to change the current version of the processdefinition. Sometimes this is easier. There has been some discussion on this in the forums View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4133422#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...