I am not sure i understand, Are you saying ur process definitions refer to different versions of the same class? As in an updated process def has the updated version and older one uses the original. Give it a name spaced package name? version1.Handler, version2.Handler? Any one consistent strategy would work I guess. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4245713#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...