问：VS2015社区更新3是否在Win7SP1上为Win10 Build 10586编译Windows UWP应用程序？

Question

I have a PC with Windows 7 SP1 (64bit) that I have been using to build a Windows store app. I've been using Visual Studio 2015 Community Edition Update 2. This worked great until I applied Visual Studio Update 3 and the latest Windows SDK (14393).

When I target the previous release (10586), I get the following error when I try to compile a C# project:

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Program Files (x86)\\MSBuild\\Microsoft\\VisualStudio\\v14.0\\AppxPackage\\Microsoft.AppXPackage.Targets(2151,5): error APPX0002: Task 'GenerateAppxPackageRecipe' failed. 0x7F - Failed to load MRM support library.

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(I have a C++ UWP project in the same solution and it compiles into a DLL without any issues.)

I've tried reinstalling VS2015 Update 2, reinstalling VS2015 Update 3, repairing Visual Studio, repairing the Windows SDK for 10586. None of these worked.

I know the latest Windows 10 SDK does not support Windows 7 SP1; however, does this apply to all previous Windows 10 SDK's?

Answer 1

Finally, after days of repairing and re-installing, I finally fixed this.

Step 1: Assuming you installed Visual Studio in the default location, goto the following folder: C:\\Program Files (x86)\\MSBuild\\Microsoft\\VisualStudio\\v14.0\\AppxPackage

Step 2: Rename Microsoft.AppxPackage.Targets to something else. I added "-old" after Package.

Step 3: Clean the solution.

Step 4: Confirm you are targeting Windows 10 Build 10586.

Step 5: Build the solution.

My targets file is dated May 31, 2016 before I even installed Visual Studio 2015. Before I did these steps, I also deleted everything in the bin/Debug folder but I'm not sure if this helped or not.

Answer 2

Program Files (x86)\\MSBuild\\Microsoft\\VisualStudio\\v14.0\\AppxPackage\\Microsoft.AppXPackage.Targets(2151,5): error APPX0002: Task 'GenerateAppxPackageRecipe' failed. 0x7F - Failed to load MRM support library.

This is a known issue in Windows 10 SDK (ver. 10.0.14393.33) which is included in Visual Studio 2015 with Update 3. And it has been fixed in QFE Build 10.0.14393.795 .

This non-security update includes quality improvements:

• Addressed issue where developers could not build UWP apps on Windows 7 because MRMSupport.dll failed to load.
• Addressed issue where MidlRT and MDMerge failed to run on Windows 7
• Addressed issue where SDK setup failed to install on Windows
• Addressed issue where deploying a legacy Store app to a 8.1 Phone caused Visual Studio to crash
• Addressed issue where application data was not preserved across remote debugging sessions when apps were getting un-registered

For more info, please see Windows SDK and emulator archive .

To solve this problem, please go to Add/Remove Programs and Uninstall Windows Software Development Kit - Windows 10.0.14393.33 . Then reinstall the 10.0.14393.795 version from Windows SDK and emulator archive . After this, you should be able to build the UWP app with no error.

However, on Windows 7, with Visual Studio 2015, the official support for Windows Universal is " Build only ". A lot of other Visual Studio features are degraded. So if you are developing Windows Universal Apps, Windows 10 is strongly recommended . For more info, please see this answer .