The WorkingMemoryEventListener doesn't set the oldObject for objectUpdated method. ---------------------------------------------------------------------------------- Key: JBRULES-2129 URL: https://jira.jboss.org/jira/browse/JBRULES-2129 Project: JBoss Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-core Affects Versions: 5.1.0.M1 Reporter: John Bebbington Assignee: Mark Proctor The org.drools.event.rule.impl.ObjectEventImpl.java class has a fairly obvious error in it's constructor. The line: object = event.getOldObject(); Needs to be changed to: oldObject = event.getOldObject(); -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira