by 'both ways', are you referring to this: anonymous wrote : Deploy PD2 and then PD1 - delete both works fine | Deploy PD2 and then PD1 - execute PD1 and PD2 from PD1 - getting this error.. where the difference in the second way is that there are actually (ended) process instances? Other than that, you are calling GraphSession.deleteProcessDefinition(..) - or use the link in the jbpm-console - just as in the first case? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4247620#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...