Sep 08, 2016 6:41:24 PM org.zkoss.zk.ui.impl.UiEngineImpl handleError
SEVERE: 
java.lang.StackOverflowError
	at org.zkoss.zk.ui.ext.Scopes.getImplicit(Scopes.java:138)
	at org.zkoss.zk.scripting.util.GenericInterpreter.getImplicit(GenericInterpreter.java:308)
	at org.zkoss.zk.scripting.bsh.BSHInterpreter.access$400(BSHInterpreter.java:86)
	at org.zkoss.zk.scripting.bsh.BSHInterpreter$GlobalNS.getFromScope(BSHInterpreter.java:450)
	at org.zkoss.zk.scripting.bsh.BSHInterpreter$AbstractNS.getVariableImpl(BSHInterpreter.java:402)
	at bsh.NameSpace.getVariable(NameSpace.java:726)
	at bsh.Name.resolveThisFieldReference(Name.java:589)
	at bsh.Name.consumeNextObjectField(Name.java:236)
	at bsh.Name.toObject(Name.java:196)
	at bsh.Name.toObject(Name.java:179)
	at bsh.NameSpace.get(NameSpace.java:233)
	at bsh.Interpreter.get(Interpreter.java:841)
	at org.zkoss.zk.scripting.bsh.BSHInterpreter.get(BSHInterpreter.java:166)
	at org.zkoss.zk.scripting.bsh.BSHInterpreter.get(BSHInterpreter.java:185)
	at org.zkoss.zk.scripting.util.GenericInterpreter.getVariable(GenericInterpreter.java:436)
	at org.zkoss.zk.ui.impl.PageImpl.getZScriptVariable(PageImpl.java:624)
	at org.zkoss.zk.xel.impl.ExecutionResolver.resolveVariable(ExecutionResolver.java:160)
	at org.zkoss.zk.xel.impl.ExecutionResolver.resolveVariable(ExecutionResolver.java:72)
	at org.zkoss.bind.impl.BindEvaluatorXImpl$1.resolveVariable(BindEvaluatorXImpl.java:123)
	at org.zkoss.xel.zel.XelELResolver.resolve(XelELResolver.java:123)
	at org.zkoss.bind.xel.zel.BindELResolver.getValue(BindELResolver.java:109)
	at org.zkoss.zel.impl.parser.AstIdentifier.getValue(AstIdentifier.java:83)
	at org.zkoss.zel.impl.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
	at org.zkoss.zkmax.bind.impl.ValueExpressionImplEx.getValue(ValueExpressionImplEx.java:52)
	at org.zkoss.xel.zel.ELXelExpression.evaluate(ELXelExpression.java:41)
	at org.zkoss.zkmax.bind.impl.BindEvaluatorXImplEx$LazyBindXelExpression.evaluate(BindEvaluatorXImplEx.java:124)
	at org.zkoss.bind.impl.BindEvaluatorXImpl.getValue(BindEvaluatorXImpl.java:46)
	at org.zkoss.bind.impl.ReferenceBindingImpl.load(ReferenceBindingImpl.java:91)
	at org.zkoss.bind.impl.ReferenceBindingImpl.getValue(ReferenceBindingImpl.java:62)
	at org.zkoss.bind.xel.zel.BindELResolver.getValue(BindELResolver.java:143)
	at org.zkoss.zel.impl.parser.AstIdentifier.getValue(AstIdentifier.java:83)
	at org.zkoss.zel.impl.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
	at org.zkoss.zkmax.bind.impl.ValueExpressionImplEx.getValue(ValueExpressionImplEx.java:52)
	at org.zkoss.xel.zel.ELXelExpression.evaluate(ELXelExpression.java:41)
	at org.zkoss.zkmax.bind.impl.BindEvaluatorXImplEx$LazyBindXelExpression.evaluate(BindEvaluatorXImplEx.java:124)
	at org.zkoss.bind.impl.BindEvaluatorXImpl.getValue(BindEvaluatorXImpl.java:46)
	at org.zkoss.bind.impl.ReferenceBindingImpl.load(ReferenceBindingImpl.java:91)
	at org.zkoss.bind.impl.ReferenceBindingImpl.getValue(ReferenceBindingImpl.java:62)
	at org.zkoss.bind.xel.zel.BindELResolver.getValue(BindELResolver.java:143)
	at org.zkoss.zel.impl.parser.AstIdentifier.getValue(AstIdentifier.java:83)