Michal Bali wrote: Hi, The sequential execution mode throws an exception when working with the new API. It works fine with the old API. I used the following configuration: KnowledgeBaseConfiguration configuration = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(); configuration.setOption(SequentialOption.YES); Thanks for finding this, It's now fixed in trunk. This exception has been thrown: java.lang.ArrayIndexOutOfBoundsException: -1 at org.drools.common.ArrayAgendaGroup.add(ArrayAgendaGroup.java:136) at org.drools.common.DefaultAgenda.addActivation(DefaultAgenda.java:354) at org.drools.reteoo.RuleTerminalNode.assertLeftTuple(RuleTerminalNode.java:247) at org.drools.reteoo.RuleTerminalNode.assertLeftTuple(RuleTerminalNode.java:165) at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:117) at org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:78) at org.drools.reteoo.LIANodePropagation.doPropagation(LIANodePropagation.java:47) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:671) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:659) at org.drools.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:213) at com.sample.DroolsTest.main(DroolsTest.java:47) For this rule: rule "Hello World" when Message() then System.out.println( "test" ); end Tested with snapshot from 7. Mar 2009 Best Regards, Michal ------------------------------ _______________________________________________ rules-users mailing listrules-users@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users