java.lang.ClassCastException: org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj cannot be cast to org.netbeans.api.debugger.jpda.ObjectVariable
	at org.netbeans.modules.debugger.jpda.heapwalk.models.HeapActionsFilter$1.isEnabled(HeapActionsFilter.java:113)
	at org.netbeans.spi.viewmodel.Models$ActionSupport.isEnabled(Models.java:505)
	at org.openide.awt.Actions$MenuBridge.updateState(Actions.java:902)
	at org.openide.awt.Actions.connect(Actions.java:196)
	at org.openide.awt.Actions$MenuItem.<init>(Actions.java:1243)
	at org.netbeans.modules.openide.awt.DefaultAWTBridge.createPopupPresenter(DefaultAWTBridge.java:83)
	at org.openide.util.Utilities.actionsToPopup(Utilities.java:2682)
	at org.openide.util.Utilities.actionsToPopup(Utilities.java:2754)
	at org.openide.explorer.view.TreeView.createExtendedPopup(TreeView.java:932)
	at org.openide.explorer.view.TreeTableView.createPopup(TreeTableView.java:832)
	at org.openide.explorer.view.TreeTableView.createPopup(TreeTableView.java:822)
	at org.openide.explorer.view.TreeTableView.access$300(TreeTableView.java:199)
	at org.openide.explorer.view.TreeTableView$5.showPopup(TreeTableView.java:529)
	at org.openide.awt.MouseUtils$PopupMouseAdapter.maybePopup(MouseUtils.java:182)
	at org.openide.awt.MouseUtils$PopupMouseAdapter.mouseReleased(MouseUtils.java:177)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273)
	at java.awt.Component.processMouseEvent(Component.java:6099)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
	at java.awt.Component.processEvent(Component.java:5864)
	at java.awt.Container.processEvent(Container.java:2058)
	at java.awt.Component.dispatchEventImpl(Component.java:4466)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4296)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
	at java.awt.Container.dispatchEventImpl(Container.java:2102)
	at java.awt.Window.dispatchEventImpl(Window.java:2458)
	at java.awt.Component.dispatchEvent(Component.java:4296)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:284)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)