Hi All, I tried to use Drools Verifier to validate the available rules. I got all the warning types like MISSING_EQUALITY, ALWAYS_FALSE. But I couldn t get the redundancy warning, eventhough i have given the duplicate rules explicitly. I am using Drools Verifier 5.4.0.Final. Herewith given the following details, 1. Sample rule file rule "rule 1" when $server : Server(processors==2, memory==1024) then System.out.println("rule 1") end rule "rule 2" when $server : Server(processors==2, processors!=2) then System.out.println("rule") end rule "rule 3" when $server : Server(processors==2, memory==1024) then System.out.println("rule 3") end 2. Code which verifies the validity of the rule. VerifierBuilder vBuilder = VerifierBuilderFactory.newVerifierBuilder(); Verifier verifier = vBuilder.newVerifier(); verifier.addResourcesToVerify(new ClassPathResource("sample.drl", DroolsVerifierCheck.class), ResourceType.DRL); verifier.fireAnalysis(); VerifierReport result = verifier.getResult(); // To display the warnings in verifier. Collection<VerifierMessageBase> warningMessages = result.getBySeverity(Severity.WARNING); for (VerifierMessageBase msg : warningMessages) { System.out.println("Note: " + msg.getMessage() + " type: " + msg.getMessageType() + " on: " + msg.getFaulty()); } Problem In the sample rule, you can find rule 1 and rule 3 are same. But I didn t get the warning for redundancy. Research done When i debug the code, i found like the rule "Find redundant pattern possibilities from rule possibilities" and "Find redundant restrictions from pattern possibilities" are loaded into the Knowledge base created and tagged with Agenda group as Main, but those are not present in the Knowledge session created (I mean after inserting the objects into the Knowledge session in the code : VerifierImpl.java). Also can anybody explain when a rule will be present in the knowledge base but not selected by the agenda. I haven t modified anything in the AgendaFilter and its given the default value ScopeAgendaFilter. Kindly let me know why the redundancy warning is not given in my case ? P.S : I have gone through the post below, http://http://drools.46999.n3.nabble.com/Drools-verifier-td2681002.html http://drools.46999.n3.nabble.com/Drools-verifier-td2681002.html and at the bottom they have asked the same question, but there is no answer available for it. Thanks, Prasanna. -- View this message in context: http://drools.46999.n3.nabble.com/Redundancy-check-option-not-working-in-... Sent from the Drools: User forum mailing list archive at Nabble.com.