RadPaneGroup Error

[Mark]

Hello,

I am working with v2010.3 1110 inside Expression Blend

I placed a RadDockPanel on a form and am trying to add a RadPanel.  I receive the following error:

"Cannot add content to an object of type "RadPanelGroup"

This error only occurs inside the XAML designer, which tells me "Invalid XAML".  However, the app runs without an error

Please find an example of the XAML below:

 <telerik:RadDocking
   x:Name="Docking"
   BorderBrush="White"
   BorderThickness="2"
   Margin="5"
   Background="{x:Null}">
   
   <telerik:RadDocking.DocumentHost>
    <telerik:RadSplitContainer>
     <telerik:RadPaneGroup>
    
        (Error occurs here...)
      <telerik:RadPane Header="Test 1">
       <TextBlock TextWrapping="Wrap"
        Text="A test for the docking panel"></TextBlock>
      </telerik:RadPane>

        (and again here..)
      <telerik:RadPane Header="Description" CanFloat="False">
      </telerik:RadPane>

     </telerik:RadPaneGroup>
    </telerik:RadSplitContainer>
   </telerik:RadDocking.DocumentHost>

 </telerik:RadDocking>

any idea what is wrong here.. I'm follow an example that Telerik published on the website.

Thanks,
Mar

[George]

Hello Mark,

Could you please try to clean and rebuild the application. Let me know if you still have any problems with RadDocking control. 

Greetings,
George
the Telerik team