Catastrophic failure while running rrw: System.ArgumentException: Reference path doesn't exist.

[Lohoris2]

I updated Unity to 4.3 from 4.2 and I’ve updated prime31 too. I’ve selected 8.1 as Windows SDK, and I’ve installed VS Express 2013.

When I try to build for Windows Store, I get the following error:

Error building Player: Exception: Failed to run Reference Rewriter with cmdline --target="Temp/StagingArea\Assembly-CSharp-firstpass.dll" --framework="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5.1" --platform="C:\Program Files (x86)\Windows Kits\8.1\References\CommonConfiguration\Neutral\Windows.winmd" --support="Temp/StagingArea\WinRTLegacy.dll" --system=Unity --dbg=pdb --alt=System.Xml.Serialization.[Temp/StagingArea\Assembly-CSharp-firstpass.dll]
Catastrophic failure while running rrw: System.ArgumentException: Reference path doesn't exist.
Parameter name: frameworkPath
   at Unity.ReferenceRewriter.RewriteContext.CheckFrameworkPath(String frameworkPath)
   at Unity.ReferenceRewriter.RewriteContext.CheckFrameworkPaths(String[] frameworkPaths)
   at Unity.ReferenceRewriter.RewriteContext.For(String targetModule, DebugSymbolFormat symbolFormat, String supportModule, String[] frameworkPaths, String platformPath, ICollection`1 strongNamedReferences, ICollection`1 winmdReferences, IDictionary`2 alt)
   at Unity.ReferenceRewriter.Program.Main(String[] args)

The same project compiles fine on another pc.
I’m a bit clueless about where to look to fix that: found many random posts, but most were without answers, and occasionally with an answer which didn’t apply to my situation.

What can I do?

PS: downgrading is not an option, since I need consumables, which aren’t supported in earlier versions.

[Lohoris2]

There were many “paths”, so it was easy to miss one: I’ve noticed it was searching for path C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5.1, while there only is v4.5. However I had installed both VS 2013 and the Windows 8.1 SDK.

Turns out I had to install “VS 2013 for Windows”, while I installed instead “VS 2013 for Windows Desktop”. Doing this fixed the problem: that directory was created, and Unity was able to compile.

A better error would definitely have helped…