[rules-users] Question about backing up a flow

Hello everyone, I'm new to drools & I'm trying my hand at creating a rule-flow in which I can back a couple of steps & the KnowledgeSession is restored to the same state it was in earlier. I'm using Drools 5.1.0 M1 & Eclipse 3.5. I have a rule-flow with the following nodes: A->B->C where A would be a node asking for an input (our fact), B would be a Rule Task that would apply certain rules on our fact & at C, I may decide that I need to back up to node A. Both A & C are custom work items. I've managed to rollback the transaction (I borrowed a lot of code from the test classes in the source, thanks a ton for them). But I just can't get my process to start again. I'll paste a couple of lines of code from my test class below: ..... ProcessInstance pi = ksession.startProcess("sampleflow"); ksession.fireAllRules(); ut = (UserTransaction) new InitialContext().lookup( "java:comp/UserTransaction" ); ut.begin();//Is beginning the transaction boundary here correct? ..... //Now I roll back the transaction depending on the input at node C ut.rollback(); ..... //And recreate the knowledge session ksession = JPAKnowledgeService.loadStatefulKnowledgeSession(id, kbase, null, env); I expected the session to restart the process from node A once it was recreated. Am I going in the right direction? Or is my basic understanding of how session persistence works in Drools Flow flawed? I'd really appreciate a push in the right direction. Thanks in advance, Mahesh.