Telerik Error after installing - Windows 10 KB5005033

[Jonathan]

Hi I just installed a MS Security Update.

Windows 10 KB5005033 -  https://support.microsoft.com/en-au/topic/august-10-2021-kb5005033-os-builds-19041-1165-19042-1165-and-19043-1165-b4c77d08-435a-4833-b9f7-e092372079a4

Now I get this ugly Telerik Error.  any ideas?  thx



Must be non-negative and less than the size of the collection. Parameter name: index at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) at Telerik.Windows.Controls.RadComboBoxAutomationPeer.RaiseSelectionEvents(SelectionChangedEventArgs e) at System.Windows.Controls.Primitives.Selector.SelectionChanger.End() at System.Windows.Controls.Primitives.Selector.SelectionChanger.SelectJustThisItem(ItemInfo info, Boolean assumeInItemsCollection) at System.Windows.Controls.Primitives.Selector.OnSelectedIndexChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args) at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType) at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal) at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value) at Flom2K18.Truckbook.btnRepeat_Click(Object sender, RoutedEventArgs e) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.Controls.Primitives.ButtonBase.OnClick() at System.Windows.Controls.Button.OnClick() at Telerik.Windows.Controls.RadButton.OnClick() at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonDown(MouseButtonEventArgs e) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent) at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.InputFilterMessage(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 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler) 

[Dilyan Traykov]

Hi Jonathan,

Thank you for the provided stack trace.

This exception seems to be caused by the creation of automation peers. If you do not require this, you can set the AutomationMode property of the AutomationManager to Disabled:

    public App() 
    { 
        AutomationManager.AutomationMode = AutomationMode.Disabled; 
        this.InitializeComponent(); 
    } 

If you do not find this possible, please demonstrate this exception in a small sample project so that I can further investigate its cause at my end.

If you're unable to do so, please share more details on the action steps which lead to the exception. As I noticed that it is fired after a button is clicked, you can share the code from the btnRepeat_Click handler. Please also share the machine's specifications and more specifically - whether it is a touch device or not.

I will be awaiting your reply.

Regards,
Dilyan Traykov
Progress Telerik

[Jonathan]

thanks..

I have an older version currently running... where can I find

using Telerik.Windows.Automation.Peers;  
 
 

[Dilyan Traykov]

Hello Jonathan,
The AutomationManager class was introduced with the Q3 2014 release of the controls. If you're using a prior version, it will not be available.
With that said, it is possible that the issue you observe has been fixed with a later version so I can suggest upgrading if you find this possible.

[Jonathan]

Hi.. where can I find the old downloads?

The new version breaks my code.

thx

[Jonathan]

I installed a 2018 Version.. but do not see Telerik.Windows.Automation.Peers

[Jonathan]

Hi... Any ideas?

[Dilyan Traykov]

Hi Jonathan,
I tried this with the 2018.1.116 version of the controls, however, the Telerik.Windows.Automation.Peers namespace is in fact present at my end. I'm providing a small sample project to demonstrate this. Please observe the App.xaml.cs file.
As for acquiring a previous version, you can only access the downloads for the releases in which you've had a valid license. If you'd like us to enable an earlier version for you to download, please specify which one.

[Jonathan]

Hi.. I have 2018.1.116 and the most recent. I can't seem to locate Telerik.Windows.Automation.Peers. What reference do I need to add? thx

[Dilyan Traykov]

Hi Jonathan,
To use the members of the Telerik.Windows.Automation.Peers namespace, you need to reference the Telerik.Windows.Controls assembly as I have done in the sample project. Please let me know whether doing so resolves your issue.

[Jonathan]

thx again!