Hello World
java.lang.RuntimeException: unable to execute Action
	at org.drools.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:56)
	at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:111)
	at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:141)
	at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:128)
	at org.drools.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:49)
	at org.drools.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:41)
	at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:111)
	at org.drools.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:16)
	at org.drools.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:181)
	at org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:230)
	at org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1618)
	at org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1583)
	at org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:258)
	at com.sample.RuleFlowTest.main(RuleFlowTest.java:29)
Caused by: [Error: drools.update(BigDecimal.ONE): null]
[Near : {... Unknown ....}]
             ^
[Line: 1, Column: 0]
	at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:374)
	at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:138)
	at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:134)
	at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)
	at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:104)
	at org.mvel2.MVEL.executeExpression(MVEL.java:977)
	at org.drools.base.mvel.MVELAction.execute(MVELAction.java:111)
	at org.drools.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:54)
	... 13 more
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:931)
	at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:316)
	... 20 more
Caused by: org.drools.FactException: Update error: handle not found for object: 1. Is it in the working memory?
	at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:152)
	... 26 more