[Haskell-cafe] cabal build fails: sidebyside

[Gregory Guthrie]

I have a fairly simple Haskell program which I build with cabal, which ends up seemingly successful with an executable (apl.exe).
(but what a path(!):
  . \dist-newstyle\build\x86_64-windows\ghc-8.10.1\apl-0.0.1\build\apl\apl.exe

Running that gives an error:
Program 'apl.exe' failed to run: The application has failed to start because its side-by-side configuration
is incorrect. Please see the application event log or use the command-line sxstrace.exe tool for more
detailAt line:1 char:1
+ ./apl
+ ~~~~~.
At line:1 char:1
+ ./apl
+ ~~~~~
    + CategoryInfo          : ResourceUnavailable: (:) [], ApplicationFailedException
    + FullyQualifiedErrorId : NativeCommandFailed

Looking in the Windows event viewer, it reports:
     Activation context generation failed for "...\apl.exe". Error in manifest or policy file "...apl.exe" on line 2. Invalid Xml syntax.

Sxstrace did not seem to give any additional information:
Begin Activation Context Generation.
Input Parameter:
                Flags = 0
                ProcessorArchitecture = AMD64
                CultureFallBacks = en-US;en
                ManifestPath = D:\CS\Courses\CS505 -APL\Labs & Hmwks\Dsem Labs -Haskell Solns\dist-newstyle\build\x86_64-windows\ghc-8.10.1\APL-0.0.1\build\APL\apl.exe
                AssemblyDirectory = D:\CS\Courses\CS505 -APL\Labs & Hmwks\Dsem Labs -Haskell Solns\dist-newstyle\build\x86_64-windows\ghc-8.10.1\APL-0.0.1\build\APL\
                Application Config File =
-----------------
INFO: Parsing Manifest File D:\CS\Courses\CS505 -APL\Labs & Hmwks\Dsem Labs -Haskell Solns\dist-newstyle\build\x86_64-windows\ghc-8.10.1\APL-0.0.1\build\APL\apl.exe.
                INFO: Manifest Definition Identity is (null).
                ERROR: Line 2: XML Syntax error.
ERROR: Activation Context generation failed.
End Activation Context Generation.

Online some posts suggest installing a current VC_redist - I did that, no relief.

Any suggestions on what is causing this, and a fix?

Running GCH: 8.10.1
Cabal: 3.2.0.0
Windows 10

Dr. Gregory Guthrie

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