No DLLs (or no files at all) in asmdir

No DLLs (or no files at all) in asmdir

Error message:

Execution aborted: Argument rootAssemblies is empty.

This happens when there are domain library assemblies in the directory specified by the /asmdir parameter. The most likely cause (at least in the practice of the author) is to Clean the build in Visual Studio and forget to rebuild the domain library project.