I had the same problem - actually there were two problems. First the Python.Runtime.key file from my cvs download didn't work; I used the file from the binary install. Second, the makefile is not understood by MS DevStudio, so I went through the makefile and built it "by hand." In other words, I just manually built all the modules as specified in the makefile. Alternatively, you could create a new MS DevStudio project and build it that way. _____ From: pythondotnet-bounces@python.org [mailto:pythondotnet-bounces@python.org] On Behalf Of david Powell Sent: Friday, September 17, 2004 6:31 AM To: PythondotNet Subject: [Python.NET] Procedure for building Python.Runtime.dll I was hoping to experiment with modifications to component files in the runtime. Most just making some things public. I cannot get nmake to work with the makefile in \PythonNet-1.0-beta3\src This is on both XP and 2k machines. The nmake comes with Visual studio and on my system is found in c:\program files\microsoft visual studio .NET 2003\sdk\v1.1\bin Any thoughts? Regards David