NullReferenceException by adding row

[Alex]

Hello

I am using the radgridview and when adding a row I receive sometimes the following error message:

System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.
   bei Telerik.Windows.Controls.GridView.GridViewDataControl.<ShowInsertRowIfNeeded>b__3f(FrameworkElement f)
   bei Telerik.Windows.Controls.GridView.GridViewDataControl.<>c__DisplayClass84.<CallbackAction>b__83(FrameworkElement f)
   bei Telerik.Windows.Controls.GridView.GridViewDataControl.FlatLayoutStrategy.<>c__DisplayClassfa.<ScrollRowIndexIntoView>b__f5()
   bei System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   bei System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   bei System.Windows.Threading.DispatcherOperation.InvokeImpl()
   bei System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
   bei System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   bei System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   bei System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   bei System.Windows.Threading.DispatcherOperation.Invoke()
   bei System.Windows.Threading.Dispatcher.ProcessQueue()
   bei System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   bei MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   bei MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   bei System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   bei System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   bei System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   bei MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   bei MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   bei System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   bei System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   bei System.Windows.Window.ShowHelper(Object booleanBox)
   bei System.Windows.Window.Show()
   bei System.Windows.Window.ShowDialog()
   bei Telerik.Windows.Controls.InternalWindow.WindowWithNoChromeWindowHost.Open(Boolean isModal)
   bei Telerik.Windows.Controls.WindowBase.ShowWindow(Boolean isModal)...

Do you know what the source of this error message is? And even better how can I solve this or find a solution without this error message?

Note - we have been able to narrow it down to the following scenarios (at current time):
- the error occurs if I add very quickly in succession new rows to the grid
- the error occurs if the computer hard drive is maxed out and I add rows normally (not fast)

 

Sincerly,

Kasar

[Stefan]

Hello Ates,

I have already replied you in the support thread you opened regarding this issue. In order to avoid double posting, I would kindly ask you to continue any further communication regarding this case in it.

Regards,
Stefan
Telerik