NuGet fails to load PowerShell

Question

I have a problem similar to the reflector problem, except that I don't have the Reflector plugin installed, and I still can't start the NuGet console. I'm running on Windows 7 Professional, VS 2010 SP1.

Nuget works fine through the GUI, but for instance, I can't install *.vsdoc files without the console.

The following error is:

The following error occurred while loading the extended type data file: Microsoft.PowerShell.Core, C:\Windows\SysWOW64\WindowsPowerShell\v1.0\types.ps1xml(2943) : Error in type "System.Security.AccessControl.ObjectSecurity": Exception: Cannot convert the "Microsoft.PowerShell.Commands.SecurityDescriptorCommandsBase" value of type "System.String" to type "System.Type".
The following error occurred while loading the extended type data file: Microsoft.PowerShell.Core, C:\Windows\SysWOW64\WindowsPowerShell\v1.0\types.ps1xml(2950) : Error in type "System.Security.AccessControl.ObjectSecurity": Exception: Cannot convert the "Microsoft.PowerShell.Commands.SecurityDescriptorCommandsBase" value of type "System.String" to type "System.Type".
The following error occurred while loading the extended type data file: Microsoft.PowerShell.Core, C:\Windows\SysWOW64\WindowsPowerShell\v1.0\types.ps1xml(2957) : Error in type "System.Security.AccessControl.ObjectSecurity": Exception: Cannot convert the "Microsoft.PowerShell.Commands.SecurityDescriptorCommandsBase" value of type "System.String" to type "System.Type".
The following error occurred while loading the extended type data file: Microsoft.PowerShell.Core, C:\Windows\SysWOW64\WindowsPowerShell\v1.0\types.ps1xml(2964) : Error in type "System.Security.AccessControl.ObjectSecurity": Exception: Cannot convert the "Microsoft.PowerShell.Commands.SecurityDescriptorCommandsBase" value of type "System.String" to type "System.Type".
The following error occurred while loading the extended type data file: Microsoft.PowerShell.Core, C:\Windows\SysWOW64\WindowsPowerShell\v1.0\types.ps1xml(2971) : Error in type "System.Security.AccessControl.ObjectSecurity": Exception: Cannot convert the "Microsoft.PowerShell.Commands.SecurityDescriptorCommandsBase" value of type "System.String" to type "System.Type".
The following error occurred while loading the extended type data file: , C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\Extensions\Microsoft Corporation\NuGet Package Manager\1.2.20325.9034\Scripts\NuGet.Types.ps1xml(9) : Error in type "System.__ComObject#{866311e6-c887-4143-9833-645f5b93f6f1}": Exception: Cannot convert the "NuGet.VisualStudio.ProjectExtensions" value of type "System.String" to type "System.Type".
The following error occurred while loading the extended type data file: , C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\Extensions\Microsoft Corporation\NuGet Package Manager\1.2.20325.9034\Scripts\NuGet.Types.ps1xml(33) : Error in type "Microsoft.VisualStudio.FSharp.ProjectSystem.Automation.OAProject": Exception: Cannot convert the "NuGet.VisualStudio.ProjectExtensions" value of type "System.String" to type "System.Type".
System.Management.Automation.CmdletInvocationException: Could not load file or assembly 'Scripts\nuget.psm1' or one of its dependencies. The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG)) ---> System.IO.FileLoadException: Could not load file or assembly 'Scripts\nuget.psm1' or one of its dependencies. The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG)) ---> System.ArgumentException: Illegal characters in path.
at System.IO.Path.CheckInvalidPathChars(String path)
at System.IO.Path.Combine(String path1, String path2)
at Microsoft.VisualStudio.Platform.VsAppDomainManager.<AssemblyPaths>d__1.MoveNext()
at Microsoft.VisualStudio.Platform.VsAppDomainManager.InnerResolveHandler(String name)
at Microsoft.VisualStudio.Platform.VsAppDomainManager.ResolveHandler(Object sender, ResolveEventArgs args)
at System.AppDomain.OnAssemblyResolveEvent(RuntimeAssembly assembly, String assemblyFullName)
--- End of inner exception stack trace ---
at Microsoft.PowerShell.Commands.ModuleCmdletBase.LoadBinaryModule(Boolean trySnapInName, String moduleName, String fileName, Assembly assemblyToLoad, String moduleBase, SessionState ss, String prefix, Boolean loadTypes, Boolean loadFormats, Boolean& found)
at Microsoft.PowerShell.Commands.ModuleCmdletBase.LoadModuleNamedInManifest(String moduleName, String moduleBase, Boolean searchModulePath, String prefix, SessionState ss, Boolean loadTypesFiles, Boolean loadFormatFiles, Boolean& found)
at Microsoft.PowerShell.Commands.ModuleCmdletBase.LoadModuleManifest(ExternalScriptInfo scriptInfo, ManifestProcessingFlags manifestProcessingFlags, Version version)
at Microsoft.PowerShell.Commands.ModuleCmdletBase.LoadModule(String fileName, String moduleBase, String prefix, SessionState ss, Boolean& found)
at Microsoft.PowerShell.Commands.ImportModuleCommand.ProcessRecord()
at System.Management.Automation.Cmdlet.DoProcessRecord()
at System.Management.Automation.CommandProcessor.ProcessRecord()
--- End of inner exception stack trace ---
at System.Management.Automation.Runspaces.PipelineBase.Invoke(IEnumerable input)
at System.Management.Automation.Runspaces.Pipeline.Invoke()
at NuGetConsole.Host.PowerShell.Implementation.PowerShellHost.Invoke(String command, Object input, Boolean outputResults)
at NuGetConsole.Host.PowerShell.Implementation.PowerShellHostExtensions.ImportModule(PowerShellHost host, String modulePath)
at NuGetConsole.Host.PowerShell.Implementation.PowerShellHost.LoadStartupScripts()
at NuGetConsole.Host.PowerShell.Implementation.PowerShellHost.Initialize()
at NuGetConsole.Implementation.Console.ConsoleDispatcher.Start()
at NuGetConsole.Implementation.PowerConsoleToolWindow.MoveFocus(FrameworkElement consolePane)

Answer 1

The only solution that worked was to start the PowerShell manually before starting VS2010.

So if anybody had this problem that's the quick fix.

Answer 2

NuGet needs Powershell2 to work correctly. You can download and install if from here: http://support.microsoft.com/kb/968929