Crash in dragging that I couldn't catch

Mar 30, 2010 at 8:38 PM

 

Not positive what the user was doing, but this was the end result
System.NullReferenceException: Object reference not set to an instance of an object.
   at AvalonDock.OverlayWindow.HideOverlayPaneDockingOptions(Pane surfaceElement)
   at AvalonDock.OverlayWindow.ShowOverlayPaneDockingOptions(Pane pane)
   at AvalonDock.Pane.OnDragEnter(Point point)
   at AvalonDock.DragPaneServices.StartDrag(FloatingWindow wnd, Point point, Point offset)
   at AvalonDock.DockingManager.Drag(FloatingWindow floatingWindow, Point point, Point offset)
   at AvalonDock.FloatingWindow.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

Any advice for preventing this?

 

 

 

2010-03-30 13:06:23,260 [3228] ERROR ReportEditor.App [(null)] - Uncaught Exception
System.NullReferenceException: Object reference not set to an instance of an object.
   at AvalonDock.OverlayWindow.HideOverlayPaneDockingOptions(Pane surfaceElement)
   at AvalonDock.OverlayWindow.ShowOverlayPaneDockingOptions(Pane pane)
   at AvalonDock.Pane.OnDragEnter(Point point)
   at AvalonDock.DragPaneServices.StartDrag(FloatingWindow wnd, Point point, Point offset)
   at AvalonDock.DockingManager.Drag(FloatingWindow floatingWindow, Point point, Point offset)
   at AvalonDock.FloatingWindow.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)