Error when switching tabItem first time

[Nathan]

Hi

I have a tabControl with 2 tabItems. Each of which contains a GridView that is bound to a RIA datasource.

<telerik:RadTabControl>
    <telerik:RadTabItem Header="Tab 1">
                <telerik:RadGridView .... />
    </telerik:RadTabItem>
    <telerik:RadTabItem Header="Tab 2">
                <telerik:RadGridView .... />
    </telerik:RadTabItem>
</telerik:RadTabControl>

When I switch tabItem for the first time I will get the following error:

Microsoft JScript runtime error: Unhandled Error in Silverlight Application Object does not match target type.   at System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.EventInfo.RemoveEventHandler(Object target, Delegate handler)
   at Telerik.Windows.Data.WeakEvent.WeakListener`1.Unsubscribe()
   at Telerik.Windows.Controls.GridView.GridViewScrollViewer.OnUnloaded(Object sender, RoutedEventArgs e)
   at MS.Internal.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)

If I ignore the error the tabItem is changed and the corrosponding GridView is loaded and everything is fine. I can then swich between TabItems without any further errors occuring.

This is mighty strange, is there anyway I can prevent the error from occuring?

Thank you for any help.

[Petar Mladenov]

Hello Nathan,

We are unable to reproduce this exception in our test scenario. Could you please provide a runnable sample showing the issue? This way we could investigate in depth and provide you with a better advice. Thank you for your cooperation in advance.

All the best,
Petar Mladenov
the Telerik team