run Ensemble8 and select Samples->Concurrency->Service. Click Refresh button. It throws NPE
java.lang.NullPointerException
        at javafx.scene.control.TableCell.updateItem(Unknown Source)
        at javafx.scene.control.TableCell.indexChanged(Unknown Source)
        at javafx.scene.control.IndexedCell.updateIndex(Unknown Source)
        at com.sun.javafx.scene.control.skin.TableRowSkinBase.handleControlPropertyChanged(Unknown Source)
        at com.sun.javafx.scene.control.skin.TableRowSkin.handleControlPropertyChanged(Unknown Source)
        at com.sun.javafx.scene.control.skin.BehaviorSkinBase$2.call(Unknown Source)
        at com.sun.javafx.scene.control.skin.BehaviorSkinBase$2.call(Unknown Source)
        at com.sun.javafx.scene.control.MultiplePropertyChangeListenerHandler$1.changed(Unknown Source)
        at javafx.beans.value.WeakChangeListener.changed(Unknown Source)
        at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(Unknown Source)
        at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(Unknown Source)
        at javafx.beans.property.ReadOnlyIntegerWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(Unknown Source)
        at javafx.beans.property.ReadOnlyIntegerWrapper.fireValueChangedEvent(Unknown Source)
        at javafx.beans.property.IntegerPropertyBase.markInvalid(Unknown Source)
        at javafx.beans.property.IntegerPropertyBase.set(Unknown Source)
        at javafx.scene.control.IndexedCell.updateIndex(Unknown Source)
        at com.sun.javafx.scene.control.skin.VirtualFlow.layoutChildren(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Parent.layout(Unknown Source)
        at javafx.scene.Scene.doLayoutPass(Unknown Source)
        at javafx.scene.Scene$ScenePulseListener.pulse(Unknown Source)
        at com.sun.javafx.tk.Toolkit.firePulse(Unknown Source)
        at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(Unknown Source)
        at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(Unknown Source)
        at com.sun.javafx.tk.quantum.QuantumToolkit$13.run(Unknown Source)
        at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.access$300(Unknown Source)
        at com.sun.glass.ui.win.WinApplication$3$1.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)