Hi, I am running guvnor in 1 instance of my jboss server & my application in another instance of same server. My application code refers to guvnor using ChangeSet.xml. When In run my code, it gives the following error: 16:00:12,131 INFO [STDOUT] java.lang.RuntimeException: KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage 16:00:12,131 INFO [STDOUT] at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:418) 16:00:12,131 INFO [STDOUT] at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:120) 16:00:12,131 INFO [STDOUT] at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:109) But when I access the guvnor through similar code in a java class with main method(using run as>java application) it works fine, as long as my .classpath file has the following entry: <classpathentry kind="con" path="DROOLS/Drools"/> Any idea how I can add the jar files referred by this to my projects manifest.mf, which I think would solve the issue when application refers to the guvnor. -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/How-to-add-jars-of-DR... Sent from the Drools - User mailing list archive at Nabble.com.