Amin Mohammed-Coleman [http://community.jboss.org/people/amin-mc] created the discussion "Re: Classcastexception when trying to use process migration" To view the discussion, visit: http://community.jboss.org/message/635194#635194 -------------------------------------------------------------- I've narrowed this down.  If you create a StatefulKnowledgeSession using JPAKnowledgeService.newStatefulKnowledgeSession(..) then it creates a COmmandBasedStatefulKnowledgeSession which doesn't implement InternalKnowledgeRuntime.  I'm going to look at creating a statefulKnowledgession using the knowledgebase.  Is it going to be a problem if i upgrade a process instance using the non command based statefulknowledgesession and then later access that process instance with a session from JPAKnowledgeService? -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/635194#635194] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]