Are you trying to run 1) npython.exe or are you running 2) python.exe and then do import clr?
The first option is broken right now (https://github.com/pythonnet/pythonnet/issues/26), the second option should work. If this is not related to npython.exe, can you please file an issue https://github.com/pythonnet/pythonnet/issues with precise error output and replication steps? Much appreciated! Best, David -----Original Message----- From: PythonDotNet [mailto:pythondotnet-bounces+anthoff=berkeley....@python.org] On Behalf Of Rudi Lutz Sent: Friday, March 21, 2014 8:32 AM To: pythondotnet@python.org Subject: Re: [Python.NET] pip install prerelease versions Hi! I just installed using pip as instructed, but I now get an error saying that it can't find file or assembly Python.Runtime Version 4.0.0.1 and I can't find a file called that anywhere installed as part of the installation process. I have some older versions of Python.Runtime but they don't work (must be wrong version) Help. Regards, Rudi _________________________________________________ Python.NET mailing list - PythonDotNet@python.org https://mail.python.org/mailman/listinfo/pythondotnet _________________________________________________ Python.NET mailing list - PythonDotNet@python.org https://mail.python.org/mailman/listinfo/pythondotnet