Hi there, This is likely irrelevant to you, but I run things using the Drools framework (not Guvnor). In case it is helpful, here is my simple setup: KnowledgeBuilder kbBuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); File file = new File("/test/myFile.rf"); kbBuilder.add(ResourceFactory.newFileResource(file), ResourceType.DRF); //Insert your KB files here as ResourceType.DRL if (kbBuilder.hasErrors()) e.printStackTrace(); KnowledgeBase kb = kbBuilder.newKnowledgeBase(); kb.addKnowledgePackages(kbBuilder.getKnowledgePackages()); StatefulKnowledgeSession session = kb.newStatefulKnowledgeSession(); session.startProcess("myFlow"); session.fireAllRules(); Where of course "myFlow" is the name of my flow, and the file is the full path to your ruleflow. -- View this message in context: http://drools.46999.n3.nabble.com/How-to-read-ruleflow-file-tp4019812p401... Sent from the Drools: User forum mailing list archive at Nabble.com.