[Ndoc-users] error running ndocconsole

[<ms...@so...>]

I am using the ndoc port for 2.0 (ndoc-bin-1.3.1-v15.zip) from 
http://jonas.lagerblad.com/blog/?p=4.
The GUI application works fine. I am trying to use the same ndoc project 
file via the command line version, as in: 

NDocConsole -project CleanCode.ndoc -verbose 

but it always fails with this error:
 -------------
NDoc 1.3.1 (Build 1.3.1851.0; release; 1/25/2005)
http://ndoc.sourceforge.net
Initializing...
	Last step took 0.0 s
Merging XML documentation...
Error: NDoc.Core.DocumenterException
Could not load file or assembly 'CleanCode.ndoc' or one of its dependencies. 
The module was expected to contain an assembly manifest.
Error: System.BadImageFormatException
Could not load file or assembly 'CleanCode.ndoc' or one of its dependencies. 
The module was expected to contain an assembly manifest.
  at NDoc.Documenter.Msdn.MsdnDocumenter.Build(Project _project)
  at NDoc.ConsoleApplication.EntryPoint.Main(String[] args)
Error: NDoc.Core.DocumenterException
 -------------
(I removed the path to my file for brevity above--but I have triple-checked 
that it is the correct path.)
Any ideas on what I am doing wrong?