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I've copied the XAML in GettingStarted04.xaml (which is the first module to introduce the Ribbon Group) into an XBAP rather than a Windows App. It builds fine but I get a NullReferenceException if I have a Ribbon Group inside a Ribbon Tab. If I comment the Ribbon Group code out, I can successfully run the app and see the Ribbon and Ribbon Tabs.
Any suggestions?
Any suggestions?