NPE in RightTuple.unlinkFromRightParent --------------------------------------- Key: DROOLS-518 URL: https://issues.jboss.org/browse/DROOLS-518 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 6.0.0.Final, 6.0.1.Final, 6.1.0.Beta4 Environment: Windows;Java1.7.0_55,Drools 6.0.0.Final through 6.1.0.Beta4 Reporter: Thomas Mogwitz Assignee: Mark Proctor Attachments: Testcase.7z Upon porting Drools-relating code in our product from 5.5.0 to 6.0.1, I found that one unit test accompanying a rule set failed with an NullPointerException. After quite a while of debugging in the innards of the rule engine I am quite that I didn't make a mistake in porting to Drools 6.0.1 but this is rather a bug in the rule engine. Seems to me like there's something going wrong while cleaning up the working memory after firing a rule.