Cannot find vcvarsall.bat when running a Python script

Question

I am working on Vista, and using Python 2.6.4. I am using a software that utilizes a Python script, but bumped into the message:

cannot find vcvarsall.bat 

So, I installed visual c++ 2010. Still the file is not found - though, it is there. My guess (a very uneducated one...) is that somewhere the path is wrong, because I also have an old visual 2008 (pretty empty) folder. I have no idea where to make the changes for the new path. Do I change something in the registry or in the script? Or somewhere else?

Answer 1

It seems that Python is looking explicitly for Visual Studio 2008. I encountered this problem where it couldn't find vcvarsall.bat even though it was on the path.

It turns out that Visual Studio 2010 creates the following environment variable:

SET VS100COMNTOOLS=C:\Program Files\Microsoft Visual Studio 10.0\Common7\Tools\ 

The fix is to create a variable called VS90COMNTOOLS and have that point to your Visual Studio 2010 common tools folder, e.g.

SET VS90COMNTOOLS=C:\Program Files\Microsoft Visual Studio 10.0\Common7\Tools\ 

That fixed it for me and I can now build packages using the Visual Studio 2010 compiler.

You can also set the VS90 environment variable to point to the VS100 environment variable using the command below:

SET VS90COMNTOOLS=%VS100COMNTOOLS%