Error using mex -setup: "No supported compiler or SDK was found"

Question

I am using MatConvNet with the Microsoft Visual C/C++ 2015 compiler. It was installed and it worked. However, when I run mex -setup I get the error message No supported compiler or SDK was found. MatConvNet still works and the compiler file is clearly in C:\Program Files\MATLAB\R2017b\bin\win64\mexopts so why do I get that error message?

Answer 1

You seem to be using MATLAB R2017b. The list of supported compilers states that R2017b supports MS Visual C++ 2015 professional, so I'm guessing, you're using the community edition.

In that case, the easiest way forward is to get your hands on Visual C++ 2017, making sure that MatConvNet also works there.

Answer 2

Call:

  mex -v -setup

Then look in the details, why your compiler was not found.

In my case e.g. it was because the registry variable:

HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\SxS\VS7

was set to

C:\Program Files (x86)\Microsoft Visual Studio\2017\TestPro

instead of

C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\