Hello All, I'm a new to JBPM5, I think it should be a very good platform for integration of business rules and workflow. It might be one of our planning in 2012. As we investigate and PoC in last two months, we found some unstable problem in this platform. (http://community.jboss.org/thread/175443) We had a template solution to fix this problem, made the Ksession as singleton object. But we cannot load the snapshot or new assets easily. We have following questions: 1. how to fix this kind of old data? 2. Can the JBPM5 store the data as the JBPM4 (RDBMS)? 3. Can we have some way to watch the data in *PROCESSINSTANCEBYTEARRAY* <http://localhost:8082/query.do?jsessionid=eba938cf1dbf38d4a410125bbe37778... ? 4. If we have more than one history snapshot in the same processid(like "leadprocess"), can the JBPM5 load the correct history version for my instance? In other word, we had created the instance1 on snapshot1, instance2 on snapsot2. After the third version as the latest package. And than when I'm handling the instance1, will they still using the snapshot1 workflow? Or we need to coding in our side to achieve this? Thanks a lots Leo.Li