I am getting these errors when I try to 'Create App Packages' in Visual Studio.... The type or namespace 'UnityPlayer' could not be found The type or namespace 'WinRTBridge' could not be found The type or namespace 'AppCallbacks' could not be found The project compiles and runs OK... but only these errors appear when trying to create packages... I am running Visual Studio 2012 and Win 8.1.... Please dont tell me its a Win 8.1 problem..... ??