Hi, There is not enough documentation on drools v6.0.0-Beta3, but this is what I'm trying to do. Our system was designed with 5.3 but then we encountered the issue with synchronization (https://issues.jboss.org/browse/JBRULES-3283), so we upgraded to v 5.4. Things worked fine until we multithreaded the client code due to which we faced another issue (https://issues.jboss.org/browse/JBRULES-3675) So finally now, I'm trying to upgrade to 6.0.0-Beta3 since both those issues should've been fixed with 6.0.0-Alpha1. The problem I'm facing is, I do not have enough documentation to look at to see how to convert those things. I went through the slides etc that were posted on the mailing list for the conferences, but I'm still unable to figure it out correctly.. So, can someone point me to a JUnit or something that I can look at to figure this thing out? static { KieServices ks = KieServices.Factory.get(); KieRepository kr = ks.getRepository(); Resource res = ks.getResources().newFileSystemResource( "src/main/resources/rules/abc.drl"); KieModule kModule = kr.addKieModule(res); kc = ks.newKieContainer(kModule.getReleaseId()); } throws an exception on kr.addKieModule(res) which says Error in opening zip file.. I assume we are now expecting a jar instead of a plain drl file. Is there a way to convert this drl into a jar that the 6.0 code can understand (for compatibility purposes with the existing system)? Another thought was to make use of the Legacy API Adapter JAR, but I couldn't find any examples of the same. Can you point me to a code sample/JUnit that could explain how this works? Thanks -- View this message in context: http://drools.46999.n3.nabble.com/Upgrade-from-drools-5-4-to-6-0-0-Beta3-... Sent from the Drools: User forum mailing list archive at Nabble.com.