get console exception when running testcase 590-wrong-chart.zul

Mar 7, 2014 2:45:35 AM org.zkoss.zss.model.impl.sys.formula.FormulaEngineImpl evaluate:283
SEVERE: no matched type: org.zkoss.poi.ss.formula.eval.ErrorEval REF! when eval '#REF'!$B$13
org.zkoss.poi.ss.formula.eval.EvaluationException: no matched type: org.zkoss.poi.ss.formula.eval.ErrorEval REF!
at org.zkoss.zss.model.impl.sys.formula.FormulaEngineImpl.getResolvedValue(FormulaEngineImpl.java:352)
at org.zkoss.zss.model.impl.sys.formula.FormulaEngineImpl.evaluateFormula(FormulaEngineImpl.java:337)
at org.zkoss.zss.model.impl.sys.formula.FormulaEngineImpl.evaluate(FormulaEngineImpl.java:269)
at org.zkoss.zss.model.impl.chart.SeriesImpl.evalFormula(SeriesImpl.java:66)
at org.zkoss.zss.model.impl.chart.SeriesImpl.getName(SeriesImpl.java:119)
at org.zkoss.zssex.util.ChartHelper.prepareXYZModel(ChartHelper.java:369)
at org.zkoss.zssex.util.ChartHelper.drawChart(ChartHelper.java:189)
at org.zkoss.zssex.ui.widget.ChartWidget.initChart(ChartWidget.java:121)
at org.zkoss.zssex.ui.widget.ChartWidget.<init>(ChartWidget.java:46)
at org.zkoss.zssex.ui.widget.DefaultBookWidgetLoader.newChartWidget(DefaultBookWidgetLoader.java:414)
at org.zkoss.zssex.ui.widget.DefaultBookWidgetLoader.newChartWidgetGroup(DefaultBookWidgetLoader.java:407)
at org.zkoss.zssex.ui.widget.DefaultBookWidgetLoader.prepareChartWidgets(DefaultBookWidgetLoader.java:174)
at org.zkoss.zssex.ui.widget.DefaultBookWidgetLoader.onSheetSelected(DefaultBookWidgetLoader.java:84)
at org.zkoss.zss.ui.Spreadsheet.afterSheetSelected(Spreadsheet.java:4278)
at org.zkoss.zss.ui.Spreadsheet.setSelectedSheet(Spreadsheet.java:889)
at org.zkoss.zss.ui.Spreadsheet$InnerDataListener.onSheetDelete(Spreadsheet.java:2278)
at org.zkoss.zss.ui.Spreadsheet$InnerDataListener.access$3(Spreadsheet.java:2265)
at org.zkoss.zss.ui.Spreadsheet$InnerDataListener$4.onEvent(Spreadsheet.java:2078)
at org.zkoss.zss.model.ModelEventDispatcher.onEvent(ModelEventDispatcher.java:37)
at org.zkoss.zss.model.impl.EventListenerAdaptorImpl.sendModelEvent(EventListenerAdaptorImpl.java:54)
at org.zkoss.zss.model.impl.BookImpl.sendModelEvent(BookImpl.java:194)
at org.zkoss.zss.range.impl.NotifyChangeHelper.notifySheetDelete(NotifyChangeHelper.java:117)
at org.zkoss.zss.range.impl.RangeImpl$31.doNotifyPhase(RangeImpl.java:1100)
at org.zkoss.zss.range.impl.RangeImpl$ModelUpdateTask.invoke(RangeImpl.java:1411)
at org.zkoss.zss.model.util.ReadWriteTask.doInWriteLock(ReadWriteTask.java:34)
at org.zkoss.zss.range.impl.RangeImpl.deleteSheet(RangeImpl.java:1103)
at org.zkoss.zss.api.impl.RangeImpl.deleteSheet(RangeImpl.java:630)
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)