Package Manager Console issues

Question

I installed Asp.net MVC 3 beta which also installs NuPack, but when I open a project in Visual Studio 2010 Express, the Package Manager Console gives me this error message:

System.TypeLoadException: Could not load type 'System.Management.Automation.Runspaces.InitialSessionState' from assembly 'System.Management.Automation, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
   at NuPackConsole.Host.PowerShell.Implementation.PowerShellHostProvider.CreateHost(IConsole console)
   at NuPackConsole.Implementation.PowerConsole.HostInfo.get_WpfConsole()
   at NuPackConsole.Implementation.PowerConsoleToolWindow.get_WpfConsole()System.InvalidOperationException: Can't start ConsoleDispatcher. Host is null.
   at NuPackConsole.Implementation.Console.ConsoleDispatcher.Start()
   at NuPackConsole.Implementation.PowerConsoleToolWindow.MoveFocus(FrameworkElement consolePane)

I have been able to download packages via the "Add Package Reference" menu option, but not with the Package Manager Console. Please what could the problem be? Thanks.

Answer 1

NuPack Console requires PowerShell 2.0, so make sure that you have it installed. If you are running this on Windows XP, this might not be the case.

Answer 2

Download the Windows Management Framework Core package which contains PowerShell 2.

Use the one that matches your version of Windows.

I got exactly the same, and as the stack explicitly mentions PowerShell I searched / downloaded / installed (& unfortunately were asked to restart) ... done :)