I was deploy Guvnor(drools-5.0.0.CR1-guvnor) as an exploded archive on the JBoss Application Server(version jboss-4.2.3.GA). And I was * Create categories, ok * Create package,ok * Importe model, ok * Create rule, ok And create a simple Drools application(with Eclipse version 3.4 and pluging drools 5.0) that will use a package served by Guvnor: public class GuvnorTest { public static final void main(String[] args) { RuleAgent agent = RuleAgent.newRuleAgent("/Guvnor.properties"); RuleBase ruleBase = agent.getRuleBase(); WorkingMemory workingMemory = ruleBase.newStatefulSession(); Driver d = new Driver("Jarek", 20, null); workingMemory.insert(d); workingMemory.fireAllRules(); for (Iterator i = workingMemory.iterateObjects(); i.hasNext();) { System.out.println(i.next().getClass().getCanonicalName()); } } } The properties file: url=http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package /myNewPackage/LATEST<http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package%0A/myNewPackage/LATEST> And When the application is run I have this Exception: RuleAgent(default) EXCEPTION (Thu Jun 18 10:46:40 CEST 2009): null. Stack trace should follow. java.io.OptionalDataException at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1310) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339) at org.drools.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:189) at org.drools.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:158) at org.drools.agent.HttpClientImpl.fetchPackage(HttpClientImpl.java:50) at org.drools.agent.URLScanner.readPackage(URLScanner.java:148) at org.drools.agent.URLScanner.getChangeSet(URLScanner.java:120) at org.drools.agent.URLScanner.loadPackageChanges(URLScanner.java:96) at org.drools.agent.RuleAgent.checkForChanges(RuleAgent.java:410) at org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:362) at org.drools.agent.RuleAgent.configure(RuleAgent.java:347) at org.drools.agent.RuleAgent.init(RuleAgent.java:247) at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:187) at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:147) at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:256) at kijanowski.eu.GuvnorTest.main(GuvnorTest.java:13) Exception in thread "main" java.lang.NullPointerException at org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:363) at org.drools.agent.RuleAgent.configure(RuleAgent.java:347) at org.drools.agent.RuleAgent.init(RuleAgent.java:247) at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:187) at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:147) at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:256) at kijanowski.eu.GuvnorTest.main(GuvnorTest.java:13) I am realy stuck in the middle please please please please please help. This e-mail and/or attachment(s) is (are) confidential and may be legally protected. This message is addressed to the intended recipient only. If you are not the intended recipient of the message, please notify the sender immediately. Its contents do not constitute a commitment by the sender's company except where provided for in a written and signed agreement between you and sender's company. Any disclosure, use or dissemination, either in whole or in partial, shall be prior authorized by the sender's company by written and signed agreement. E-mail and/or attachment(s) cannot be guaranteed to be secured or error-free as information can be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender.s company has taken all reasonable precautions to ensure that any attachment to this message does not contain a virus. However, the sender.s company (and not any of its Officers, Directors, Employees or Agents) cannot be held liable for any damages resulting from or linked to the existence of a virus. You are therefore strongly advised to carry out all your own anti-virus checks before opening any and all attachments to this message. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users