为什么Visual Studio 2013使用错误的SdkToolsPath for lc.exe?

我正在将Visual Studio 2013与asp.net项目一起使用.其中一个项目给出以下错误. 为什么在错误的路径中寻找LC.exe?我的Windows 8.1 SDK已安装，并且在

I am using Visual Studio 2013 with an asp.net project. One of the projects gives the error below. Why is it looking for LC.exe in the wrong path? My Windows 8.1 SDK is installed and I have an lc.exe at

C:\Program Files (x86)\Microsoft SDKs\Windows\v8.1A\bin\NETFX 4.5.1 Tools

和64位版本，我在

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.1A

我正在查看C:\Windows\Microsoft.NET\Framework\v4.0.30319下的Microsoft.Common.targets，并且此密钥存在:SdkToolsPath="$(TargetFrameworkSDKToolsDirectory)".然后查看

I am looking at Microsoft.Common.targets under C:\Windows\Microsoft.NET\Framework\v4.0.30319 and this key exists: SdkToolsPath="$(TargetFrameworkSDKToolsDirectory)". Then looked at Microsoft.NetFramework.CurrentVersion.props under

C:\Program Files (x86)\MSBuild\12.0\Bin

和TargetFrameworkSDKToolsDirectory在$SDK40ToolsPath中定义.根据MSBuild /v:diag，

SDK40ToolsPath = C:\Program Files (x86)\Microsoft SDKs\Windows\v8.1A\bin\NETFX 4.5.1 Tools 

看起来不错. .NET 4.0中VS中的项目目标.

which looks good. The project's target in VS in .NET 4.0.

那么为什么它仍然查看错误的文件夹或注册表项?有趣的是，当我收到错误消息后重建项目时，项目可以正常构建.

So why is it still looking at the wrong folder or registry key? The interesting thing is when I rebuild the project after getting the error message, the project builds fine.

Error   5   
Task could not find "LC.exe" using the SdkToolsPath 
    "C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\bin\NETFX 4.0 Tools\" 
or the registry key 
    "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.0A\WinSDK-NetFx40Tools-x86".
Make sure the SdkToolsPath is set and the tool exists in the correct processor 
specific location under the SdkToolsPath and that the Microsoft Windows SDK is 
installed   
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets  2428    5   SuperReports