Why do I get several errors 'Unable to locate build tool' when validating my Toolchain with Microsoft Windows SDK 7.1 in R2017b?

I have installed Microsoft Windows SDK 7.1 as a compiler.

However, when I validate the Toolchain in a Simulink model, or when I generate code from it, I get the following errors:

### Validating other build tools ... 
Unable to locate build tool "Microsoft Visual C Compiler": cl 
Unable to locate build tool "Microsoft Visual C Linker": link 
Unable to locate build tool "Microsoft Visual C++ Compiler": cl 
Unable to locate build tool "Microsoft Visual C++ Linker": link 
Unable to locate build tool "Microsoft Visual C/C++ Archiver": lib 
Unable to locate build tool "NMAKE Utility": nmake 
Failed. 

When setting the compiler with mex -setup, I get the following message:

Trying to update options file: <path>\mexopts.bat
From template: <path>\mssdk71opts.bat

Answer 1

[MathWorks Support Team]

To solve this issue please follow this workflow:

1. Navigate to the first directory, and remove the BAT file mexopts.
2. Try and run again mex -setup to select SDK 7.1 as compiler.

You should now be able to successfully validate the Toolchain and generate code from a Simulink model.