Your first post "I am trying a remove a rule from the RuleBase using the following syntax and get a NullPointerException: ruleBase.removePackage("rule2392016206");" says you are removing a "rule", but you are using the removePackage method, also "rule2392016206" sounds like a rule name not a package name. Could you be confusing rules and packages ? ________________________________ From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Sarika Khamitkar Sent: 12 July 2007 14:21 To: rules-users(a)lists.jboss.org Subject: [rules-users] NullPointerException while deleting the rule package This is the again regarding the NullPointerException issue. Sorry for resending this message again. But I would really appreciate a response on how this can be resolved. The following is the exception I get while removing a package from the RuleBase. java.lang.NullPointerException at org.drools.reteoo.CompositeObjectSinkAdapter.removeObjectSink(CompositeO bjectSinkAdapter.java:125) at org.drools.reteoo.ObjectSource.removeObjectSink(ObjectSource.java:123) at org.drools.reteoo.ObjectTypeNode.removeObjectSink(ObjectTypeNode.java:29 7) at org.drools.reteoo.ObjectTypeNode.remove(ObjectTypeNode.java:232) at org.drools.reteoo.AlphaNode.remove(AlphaNode.java:187) at org.drools.reteoo.AlphaNode.remove(AlphaNode.java:187) at org.drools.reteoo.BetaNode.remove(BetaNode.java:185) at org.drools.reteoo.BetaNode.remove(BetaNode.java:187) at org.drools.reteoo.RuleTerminalNode.remove(RuleTerminalNode.java:439) at org.drools.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:135) at org.drools.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java:259) at org.drools.common.AbstractRuleBase.removePackage(AbstractRuleBase.java:4 08) .... This exception has been occurring after I recently switched to 4.0 MR3. Thanks. ________________________________ From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Sarika Khamitkar Sent: Wednesday, July 11, 2007 6:31 PM To: rules-users(a)lists.jboss.org Subject: [rules-users] NullPointerException while deleting the rule package Sorry for resending the message. This is an urgent issue and if anybody has encountered this problem, can you please let me know how it can be resolved? If I have over 3 packages in the RuleBase and I try to remove one of those packages, then I get a NullPointerException. Thanks. ________________________________ From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Sarika Khamitkar Sent: Wednesday, July 11, 2007 3:34 PM To: rules-users(a)lists.jboss.org Subject: [rules-users] NullPointerException while deleting the rule package Hi, I am trying a remove a rule from the RuleBase using the following syntax and get a NullPointerException: ruleBase.removePackage("rule2392016206"); Before removing the package, I am iterating through all the packages in the ruleBase and I can see this package name in the list. I am not sure why this exception is being thrown then. I am using 4.0 MR3. Has this feature changed since 3.0.6? Thanks. Sarika