Random error after last telerik update (2015 Q2)

[Stefania]

Hi,

after last release updated my treeview get the following random error:

Application_UnhandledThreadException

Output: A first-chance exception of type 'System.NullReferenceException' in Telerik.Windows.Controls.GridView.dll

StackTrace:

in Telerik.Windows.Controls.TreeListView.TreeListCellsPanel.GetCellLeftOffset(UIElement child, Double childWidth)
in Telerik.Windows.Controls.GridView.GridViewCellsPanel.ArrangeVirtualizedCell(GridViewCellBase cell, Size finalSize)
in Telerik.Windows.Controls.GridView.GridViewCellsPanel.ArrangeVirtualizedCells(Size finalSize)
in Telerik.Windows.Controls.GridView.GridViewCellsPanel.ArrangeOverride(Size finalSize)
in Telerik.Windows.Controls.TreeListView.TreeListCellsPanel.ArrangeOverride(Size finalSize)
in System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
in System.Windows.UIElement.Arrange(Rect finalRect)
in System.Windows.ContextLayoutManager.UpdateLayout()
in System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
in System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()
in System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
in System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
in System.Windows.Media.MediaContext.AnimatedRenderMessageHandler(Object resizedCompositionTarget)
in System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
in MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
in System.Windows.Threading.DispatcherOperation.InvokeImpl()
in System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
in System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
in System.Windows.Threading.DispatcherOperation.Invoke()
in System.Windows.Threading.Dispatcher.ProcessQueue()
in System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
in MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
in MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
in System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
in MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
in System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
in MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
in System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
in System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
in System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
in System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
in System.Windows.Forms.Application.Run(Form mainForm)
in SISCO.MileMATE.WinUI.Program.RunApplication(Boolean mailBugEnabled) in ****\Program.cs:riga 157
in SISCO.MileMATE.WinUI.Program.Main(String[] args) in ****\Program.cs:riga 114
in System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
in System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
in Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
in System.Threading.ThreadHelper.ThreadStart_Context(Object state)
in System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
in System.Threading.ThreadHelper.ThreadStart()

[Stefania]

Sorry, I mean TreeList not Treeview

[Ivan Ivanov]

Hi Stefania,

I reviewed the method that throws the exception, but I did not find any relevant clues. Would it be possible for you to send us a sample project that illustrates the issue, so that we can debug it on our side?

Regards,
Ivan Ivanov
Telerik

[Stefania]

How can I add the demo? I can attach only .gif, .jpg, .jpeg, .png

[Ivan Ivanov]

Hello,

You can send us a ticket through our support ticket system. It has 24h priority response time and supports archive attachments up to 20MB.

Regards,
Ivan Ivanov
Telerik

[Stefania]

Ok thank you. I did it.

[Dimitrina]

Hi,

Thank you for sending a sample project in the support ticket. The development team managed to resolve the error and the fix should be available with the next internal build.

Regards,
Dimitrina
Telerik

[Stefania]

Hi

I just upgraded my project to the last version (2015 Q2 SP1) and I still have the same bug

[Dimitrina]

Hi,

As it turns out there are some more aspects to be considered and the fix could not be included in the Service Pack. I forwarded your question to the development team directly and they should come back to you next week with more specific information when the fix will be available.

Regards,
Dimitrina
Telerik

[John]

Hi, any update on this? I too am experiencing this issue. I'm using version 2015.2.810.1050.

[Dimitrina]

Hi,

The fix is now checked in production and it will be available with the next week's internal build (to be released on Monday, 31 August).

Regards,
Dimitrina
Telerik