[rules-users] Getting Exceptions for ChangeSet.xml resource...

Hi to All, I am getting following exceptions while executing simple application with ChangeSet.xml resource. [2011:11:308 01:11:101:exception] java.lang.RuntimeException: KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:418) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:120) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:109) at com.code.Bankmain.createKnowledgeBase(Bankmain.java:52) at com.code.Bankmain.main(Bankmain.java:28) Caused by: java.io.InvalidClassException: org.drools.rule.Package; local class incompatible: stream classdesc serialVersionUID = 510, local class serialVersionUID = 400 at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:579) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1600) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1513) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1749) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368) at org.drools.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:189) at org.drools.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:158) at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:408) ... 4 more [2011:11:308 01:11:103:info] KnowledgeAgent new KnowledgeBase now built and in use Balance is 0 Deposit is 0 Please help me. Thanks and regards Manohar Kokkula Mailto: manohar.kokkula(a)tcs.com =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you