Mariano De Maio created JBRULES-3656: ---------------------------------------- Summary: java.lang.ClassCastException: org.drools.reteoo.AlphaNode$AlphaMemory cannot be cast to org.drools.reteoo.BetaMemory Key: JBRULES-3656 URL: https://issues.jboss.org/browse/JBRULES-3656 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-core (expert) Affects Versions: 5.5.0.Beta1, 5.4.1.Final Reporter: Mariano De Maio Assignee: Mark Proctor Attachments: P8.tar.gz When trying to add a rule package to a knowledge base I previously removed a used knowledge session from, the following error occurrs: java.lang.ClassCastException: org.drools.reteoo.AlphaNode$AlphaMemory cannot be cast to org.drools.reteoo.BetaMemory at org.drools.reteoo.NotNode.updateSink(NotNode.java:461) at org.drools.reteoo.RuleTerminalNode.attach(RuleTerminalNode.java:347) at org.drools.reteoo.builder.ReteooRuleBuilder.addSubRule(ReteooRuleBuilder.java:174) at org.drools.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.java:134) at org.drools.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:113) at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:445) at org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:952) at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:629) at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472) at org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150) ... This issue doesn't seem to happen on 5.4.0.Final but it does appear on 5.5.0.Beta1 and on branch 5.4.x I attached a project (P8.tar.gz) that allows you to test this issue. Any help would be appreciated -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira