Hello, Is it possible to persist events (from drools fusion) with default jpa mechanism? When I try to do this 'just like that' I get exception like org.drools.common.DefaultFactHandle incompatible with org.drools.common.EventFactHandle It seems that session marshaller is not really aware of certain objects being events, not facts. The code I try is more or less like: UserTransaction ut = ... StatefulKnowledgeSession session = JPAKnowledgeService .newStatefulKnowledgeSession(kbase, null, env); ut.begin() session.insert(e1); ut.commit(); StatefulKnowledgeSession sessionPersisted = JPAKnowledgeService.loadStatefulKnowledgeSession( session.getId(), kbase, null, env ); ut.begin() sessionPersisted.insert(e2); (*) <- fails ut.commit(); When I use session instead of sessionPersisted - it works fine, when e2 is a fact, not an event - it also works I know that it may be awkward to persist events which have time limitations, but I want to use time limits in rules which are like few days - so I want to have some persistence in case of server shutdown. I would be grateful for any comment, br, maciek prochniak