Process completed with exit code -2146233082

[kinook]

That is an error reported by Visual Studio (devenv), which the Make VS.NET action invokes to actually build a solution. You can check the 'Display the compiler command-line...' checkbox on the Options tab and build again, then copy/paste the command used to provide the full info on how devenv is being invoked when opening a support incident with MS.

Note that when executed outside of VBP, you'll only get the 'fatal execution...' error string, and not the exit code unless you explicitly log that (i.e., put the command in a batch file and echo %ERRORLEVEL% afterwards). BTW, the exit code corresponds to 0x80131506 (hex).