Exception in thread "main" java.lang.RuntimeException: java.lang.ClassCastException: org.drools.core.reteoo.SubnetworkTuple 
cannot be cast to java.lang.Long
	at org.drools.core.rule.SingleAccumulate.accumulate(SingleAccumulate.java:105)
	at org.drools.core.phreak.PhreakAccumulateNode.addMatch(PhreakAccumulateNode.java:714)
	at org.drools.core.phreak.PhreakAccumulateNode.doLeftInserts(PhreakAccumulateNode.java:168)
	at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:89)
	at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:581)
	at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:552)
	at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:379)
	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:339)
	at org.drools.core.phreak.RuleNetworkEvaluator.evalStackEntry(RuleNetworkEvaluator.java:237)
	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:180)