NPE due to session.update with 1 or 2 invalid operands ------------------------------------------------------ Key: JBRULES-2878 URL: https://issues.jboss.org/browse/JBRULES-2878 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-core Affects Versions: 5.1.1.FINAL Reporter: Wolfgang Laun Assignee: Mark Proctor Counter counter = new Counter( initial ); this.session.insert( counter ); And now each of these calls session.update( session.getFactHandle( null ), null ); session.update( session.getFactHandle( counter ), null ); session.update( session.getFactHandle( null ), counter ); results in a NPE Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at org.drools.common.ObjectTypeConfigurationRegistry.getObjectTypeConf(ObjectTypeConfigurationRegistry.java:58) at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:382) at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:981) at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:954) at org.drools.impl.StatefulKnowledgeSessionImpl.update(StatefulKnowledgeSessionImpl.java:266) -- This message is automatically generated by JIRA. - For more information on JIRA, see: http://www.atlassian.com/software/jira