hey, M using guvnor 5.3.0 Final version and two instances of guvnor. In my first guvnor application, i ve two packages containg all my rules which i am accessing using drools core and knowledge api v5.2.0 Final .I use type "DRL" to extract rules from my change set. In my second guvnor application, i just have a package which contains my JBPM process. Here, i am using drools 5.3.1 Final jars to connect and make my kbase. i use type = "PKG" in my chnage set, which is contradictory to JIRA <https://issues.jboss.org/browse/JBRULES-3388> is opened that a PKG cannot be read, but was working fine for my application. Now i dont want to deploy two different wars of guvnor and was expecting to do it by deploying just 1 guvnor. So instead of taking the headache of using different jars, i used a neutral GUVNOR and drools 5.4.0 final version. I deployed the guvnor, imported the old repository, built the packages and tried firing the rules using type = "DRL" in my change set. Everything Worked fine. As soon as i changed my type = "PKG" in my change set to access the rules, i got an error : java.lang.UnsupportedClassVersionError: Institutional/CalculateDateDifference : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615) at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254) at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237) at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at org.drools.rule.MVELDialectRuntimeData.getParserConfiguration(MVELDialectRuntimeData.java:270) at org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:203) at org.drools.base.mvel.MVELConsequence.compile(MVELConsequence.java:75) at org.drools.rule.MVELDialectRuntimeData.onBeforeExecute(MVELDialectRuntimeData.java:173) at org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:144) at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:599) at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472) at org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150) at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1085) at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182) at com.infy.fcs.drools.adapter.DroolsGuvnorTest.readKnowledgeBase(DroolsGuvnorTest.java:196) at com.infy.fcs.drools.adapter.DroolsGuvnorTest.main(DroolsGuvnorTest.java:107) When i tried to access the process package(Which is a diff package and contains only a process), i got the following error java.lang.UnsupportedClassVersionError: Fatca_Process/Process_Fatca_Process_Fatca_integration_queue_f06d3a378a5f49d5b7589aae2c0b686eReturnValueEvaluator7Invoker : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615) at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254) at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237) at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:435) at org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:430) at org.drools.rule.JavaDialectRuntimeData.onBeforeExecute(JavaDialectRuntimeData.java:256) at org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:138) at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:599) at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472) at org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150) at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1085) at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182) at com.infy.fcs.drools.adapter.DroolsGuvnorTest.readKnowledgeBase(DroolsGuvnorTest.java:196) at com.infy.fcs.drools.adapter.DroolsGuvnorTest.main(DroolsGuvnorTest.java:107) here is the attached changeset that i am using changeset_process.xml <http://drools.46999.n3.nabble.com/file/n4020175/changeset_process.xml> ChangeSet_rules.xml <http://drools.46999.n3.nabble.com/file/n4020175/ChangeSet_rules.xml> please lemme know, if wat i am trying to achieve is evne possible or not? If yes, then where am i going wrong ? -- View this message in context: http://drools.46999.n3.nabble.com/Complicated-Issue-tp4020175.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Thanks for the quick reply Mike.. as you can see, now i am using compatible versions i.e. drools expert v5.4.0 Final and so as GUVNOR 5.4.0 Final.. Y do i still get this error ?? -- View this message in context: http://drools.46999.n3.nabble.com/Complicated-Issue-tp4020175p4020177.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

i have been using java 6 from the start.. -- View this message in context: http://drools.46999.n3.nabble.com/Complicated-Issue-tp4020175p4020179.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users