I've been trying out the latest version of the ruleflow and I think I may have found a bug when creating looping ruleflows. I think the bug is in RuleFlowProcessInstance.getNodeInstance, where I suspect there is a return in the wrong place in the if-then-else that deals with ISplit node. I created a looping ruleflow that contains a Join and Split node, where the Split decides if we should enter the loop and the Join allows a flow to re-enter the loop body. The issues is that the second time the same Split node is re-entered I always get the following exception: java.lang.IllegalArgumentException: Illegal node type: class org.drools.ruleflow.core.impl.Split at org.drools.ruleflow.instance.impl.RuleFlowProcessInstance.getNodeInstance( RuleFlowProcessInstance.java:121) at org.drools.ruleflow.instance.impl.RuleFlowSequenceNodeInstance.triggerCompleted (RuleFlowSequenceNodeInstance.java:38) at org.drools.common.RuleFlowGroupImpl$DeactivateCallback.execute( RuleFlowGroupImpl.java:191) at org.drools.common.AbstractWorkingMemory.executeQueuedActions( AbstractWorkingMemory.java:992) at org.drools.common.AbstractWorkingMemory.fireAllRules( AbstractWorkingMemory.java:375) at org.drools.common.AbstractWorkingMemory.fireAllRules ( AbstractWorkingMemory.java:353) at org.drools.examples.SequentialTest.runTest4(SequentialTest.java:192) at org.drools.examples.SequentialTest.main(SequentialTest.java:27) This exception is only thrown if the ruleflow contains an unknown node, but org.drools.ruleflow.core.impl.Split is a valid node (i.e. an instance of ISplit)! Looking at the body of RuleFlowProcessInstance.getNodeInstance I think the return in the following part of the if-then-else is in the wrong place: else if ( node instanceof ISplit ) { IRuleFlowNodeInstance result = getFirstNodeInstance( node.getId() ); if ( result == null ) { result = new RuleFlowSplitInstance(); result.setNodeId( node.getId() ); addNodeInstance( result ); return result; } }... This code would mean that the second time the Split is entered, result is not null, so "if ( result == null )" is never entered, which results in dropping out of the if-then-else and activating the error exception above. I suspect the return should be outside the "if ( result == null )" if-statement just like the IJoin part of the if-then-else to give the following (correct?) code: else if ( node instanceof ISplit ) { IRuleFlowNodeInstance result = getFirstNodeInstance( node.getId() ); if ( result == null ) { result = new RuleFlowSplitInstance(); result.setNodeId( node.getId() ); addNodeInstance( result ); } return result; }... Once I changed the return, looping seemed to work fine. I wasn't sure about raising a JIRA about this, as this stuff is still under development. Regards Shahad _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev