Issue with RadTabControl and Test manager 2010

[André]

My application is having an error when I try to write a manual test with the TestManager.

When running the application, the error is not generated only when recording tests.

The stacktrace of the error is this:
System.NullReferenceException: Object reference not set to an instance of an object.     at Telerik.Windows.Controls.RadTabControlAutomationPeer.GetChildrenCore() in f:\113\WPF_Scrum\Current_HotFix\Sources\Development\Controls\Navigation\TabControl\RadTabControlAutomationPeer.cs:line 207     at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()     at System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit)     at System.Windows.Automation.Peers.ItemsControlAutomationPeer.UpdateChildren()     at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()     at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()     at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()     at System.Windows.Automation.Peers.AutomationPeer.FireAutomationEvents()     at System.Windows.ContextLayoutManager.fireAutomationEvents()     at System.Windows.ContextLayoutManager.UpdateLayout()     at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)     at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()     at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()     at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)     at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)     at System.Windows.Media.MediaContext.Resize(ICompositionTarget resizedCompositionTarget)     at System.Windows.Interop.HwndTarget.OnResize()     at System.Windows.Interop.HwndTarget.HandleMessage(WindowMessage msg, IntPtr wparam, IntPtr lparam)     at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(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, Int32 numArgs)     at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

[Petar Mladenov]

Hi André,

We have had similar issue before and the good news is that we fixed it. Could you please test your project with the official Q2 2011 if possible? What is the version of RadControls that you use? 

All the best,
Petar Mladenov
the Telerik team

[André]

Tested on Q2 2011 and everthing is working now. 
I'm using Ver 2011.1.617