[WSA/UWP] Fails to build C# projects due to Assembly-CSharp-firstpass.pri not found

[bboydaisuke]

Hello,
I tried to build C# project in order to debug further. But it fails.
I have no idea what “.pri” file is. Any suggestion will be appreciated.

PROBLEM
VS fails to build Unity C# projects. When it fails, the following message is logged in output window.

1>------ Build started: Project: myApp, Configuration: Debug x86 ------
1> UnityInstallationDir “C:\Program Files\Unity\Editor”.
1> UnityWSAPlayerDir “C:\Program Files\Unity\Editor\Data\PlaybackEngines\MetroSupport”.
1> UnityProjectDir “Z:\work”.
1> Copying unprocessed assemblies…
1> Running AssemblyConverter…
1> AssemblyConverter done.
1> myApp → Z:\VSBuilds\BatchBuild\myApp\bin\x86\Debug\myApp.exe
1>C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\AppxPackage\Microsoft.AppXPackage.Targets(2422,5): warning : APPX4001: Build property AppxBundlePlatforms is not explicitly set and is calculated based on currently building architecture. Use ‘Create App Package’ wizard or edit project file to set it.
1>MakePri : error 0x80070002: Processing Resources failed with error: The system cannot find the file specified.
1>MakePRI : error 0xdef00071: File Z:\work\UWP\Assembly-CSharp-firstpass\bin\x86\Debug\Assembly-CSharp-firstpass.pri not found.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

WHAT I DID
Build project from Unity to Visual Studio projects.
Build “Assembly-CSharp-firstpass” project first, “Assembly-CSharp” project next, and build myApp project.
And VS failed to build myApp project with the error above.

NOTES
It fails when “Unity C# projects” is checked for WSA build settings. It build successfully when it is unchecked.

[Tomas1856]

I think that may be happening when there are no files in Assembly-CSharp-firstpass project, can you check that?

Also what Unity version is this?

[bboydaisuke]

Thank you for reply.
I verified Assembly-CSharp-firstpass project has many files in Plugins folder so seems it’s not the case.
And Unity version is 5.3.4p1.

[Aurimas-Cernius]

@bboydaisuke

And Unity version is 5.3.4p1.

There were fixes in that area. Can you check with newest 5.3. If the issue remains, please report a bug.
Note: you may also want to try clean build. Delete the solution directory and csproj files in Unity project directory for Assembly-CSharp*.

[bboydaisuke]

Thanks,
I cleaned up .csproj and UWP folder in Unity project dir, and build destination folder. Then install Unity 5.3.5p6.
Unfortunately build failed due to “not found unprocessed” error as follows.

Failed to resolve all project references for ‘myApp’. The package restore result for ‘Z:\VSBuilds\ManualBuild\myApp\myApp.csproj’ may be incomplete.
1>------ Build started: Project: myApp, Configuration: Debug ARM ------
1> UnityInstallationDir “C:\Program Files\Unity535p6\Editor”.
1> UnityWSAPlayerDir “C:\Program Files\Unity535p6\Editor\Data\PlaybackEngines\MetroSupport”.
1> UnityProjectDir “Z:\work”.
1> Copying unprocessed assemblies…
1>Z:\VSBuilds\ManualBuild\myApp\myApp.csproj(266,5): error MSB3030: Could not copy the file “Z:\work\UWP\Assembly-CSharp\bin\ARM\Debug\Unprocessed\Assembly-CSharp.dll” because it was not found.
========== Build: 0 succeeded, 1 failed, 2 up-to-date, 0 skipped ==========

I got this error before and gave it up. I saw another error this time so I expected something has changed but seems I fall into same place.