Hello Drools users Given the following simple test rule: rule "test rule 1" when $e : Event(); not( Event(id == $e.id && this after[0s,10s] $e ) ) then System.out.println("Hello"); end placed in Guvnor and the following simple test project: ruleagent.properties: url=http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/defaultPackage/LATEST TestRuleAgent.java: RuleAgent agent = RuleAgent.newRuleAgent("/ruleagent.properties"); RuleBase rb = agent.getRuleBase(); throws the following exception: Exception in thread "main" org.drools.RuntimeDroolsException: unable to determine operator for symbol [after] at org.drools.base.evaluators.Operator.determineOperator(Operator.java:71) at org.drools.base.evaluators.Operator.readResolve(Operator.java:106) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:1061) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762) [cut objectinputstream lines] 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 ruleagent.RuleAgentTest.main(RuleAgentTest.java:16) any ideas to what I am doing wrong here? Thanks Michael