Hi All, I'm getting an error when firing the rule using the accumulate function: Number(intValue >= 1) from accumulate( fact() over window:time(1d) from entry-point "MyEntryPoint", init( int mytotal = 0; ),action( mytotal++; ),reverse( mytotal--; ),result( new Integer(mytotal) )) The error is: org.drools.RuntimeDroolsException: [Error: variable already defined within scope: class java.lang.Integer mytotal] [Near : {... Unknown ....}] ^ [Line: 1, Column: 0] at org.drools.rule.Accumulate.init(Accumulate.java:144) at org.drools.reteoo.AccumulateNode.assertLeftTuple(AccumulateNode.java:142) at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:117) at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:28) at org.drools.reteoo.JoinNode.assertObject(JoinNode.java:175) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:42) at org.drools.reteoo.PropagationQueuingNode$AssertAction.execute(PropagationQueuingNode.java:326) at org.drools.reteoo.PropagationQueuingNode.propagateActions(PropagationQueuingNode.java:221) at org.drools.reteoo.PropagationQueuingNode$PropagateAction.execute(PropagationQueuingNode.java:394) at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1486) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:158) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:122) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:80) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:28) at com.s2grupo.triton.service.impl.TemporalCorrelatorServiceImpl.insertFact(TemporalCorrelatorServiceImpl.java:95) at com.s2grupo.triton.jms.impl.JmsMessageListenerImpl.onMessage(JmsMessageListenerImpl.java:98) at org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1021) at org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:122) at org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:192) at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:122) at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:43) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: [Error: variable already defined within scope: class java.lang.Integer mytotal] [Near : {... Unknown ....}] ^ [Line: 1, Column: 0] at org.drools.base.mvel.DroolsMVELFactory.createVariable(DroolsMVELFactory.java:252) at org.mvel2.ast.TypedVarNode.getReducedValueAccelerated(TypedVarNode.java:68) at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85) at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:107) at org.mvel2.MVEL.executeExpression(MVEL.java:978) at org.drools.base.mvel.MVELAccumulator.init(MVELAccumulator.java:134) at org.drools.rule.Accumulate.init(Accumulate.java:138) ... 23 more Could anyone help me? Thanks, Nestor -- View this message in context: http://www.nabble.com/Error-accumulate-function-tp25611774p25611774.html Sent from the drools - user mailing list archive at Nabble.com.