Hi Everyone, I'm having a problem adding a rule to a custom package. I have a drl file in the com.sample package. I read in that drl file and everything is fine. I then wish to add another rule to the KnowledgeBase as a String. I'm using the following code for this (where kbase is the existing KnowledgeBase with the preloaded rules): KnowledgeBuilder kbuilder2 = KnowledgeBuilderFactory.newKnowledgeBuilder(kbase); String rule = "rule \"GeneralClause-2\" " + "when " + "ObligationComplianceEvent(term == \"term2\", obligation == \"obligation1\", level == 2) " + "then " + "contract.setState(\"Hello\");" + "end"; Resource ruleResource = ResourceFactory.newReaderResource((Reader) new StringReader(rule)); kbuilder2.add(ruleResource, ResourceType.DRL); kbase.addKnowledgePackages(kbuilder2.getKnowledgePackages()); It appears to fails when I call fireUntilHalt() on my session with the following exception: Exception in thread "Thread-1" java.lang.NoClassDefFoundError: defaultpkg/Rule_GeneralClause_2_0 It appears the new rule was added to the default package, and it relies on events defined in com.sample so I'm assuming this is the problem. My question is how can I add this rule to com.sample along with the previously loaded rules? I'm very desperate here, any help is greatly appreciated! Cheers, Justin