Why don't you merge the mappings for JBPM classes and your custom classes in the same .cfg.xml file? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961608#3961608 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3961608