When building my WiX project with WiX 3.8 in VS 2013, I get:
heat.exe(0,0): warning HEAT5151: Could not harvest data from a file that was expected to be an assembly: C:\local\eknapp\Workspace-Dispatcher\client\software\DISP.DesktopClient\DISP.DesktopClient\bin\debug\DISP.API.UI.dll. If this file is not an assembly you can ignore this warning. Otherwise, this error detail may be helpful to diagnose the failure: The given assembly name or codebase,
'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\WindowsBase\v4.0_4.0.0.0__31bf3856ad364e35\WindowsBase.dll', was invalid.
I checked the GAC, and WindowsBase.dll, version 4.0 is there. I looked inside both assemblies with Telerik's JustDecompile and all appears OK. The application runs without a problem, both within VS and when installed with the (apparently deficient) .msi, on any number of machines.
Any ideas?