Error using mex (line 206) Unable to complete successfully. Caused by: Error using cd Cannot CD to C:\Users\M​OHANK~1\Ap​pData\Loca​l\Temp (Name is nonexistent or not a directory).

I want to use a LIBSVM matlab toolbox which is written in C and required to mex the file and they given procedure for mex as follows

On MATLAB

        >> make

If make.m does not work on MATLAB (especially for Windows), try 'mex -setup' to choose a suitable compiler for mex. Make sure your compiler is accessible and workable. Then type 'make' to start the installation.

but i am getting following error

>>mex setup

Error using mex (line 206) Unable to complete successfully.

Caused by: Error using cd Cannot CD to C:\Users\MOHANK~1\AppData\Local\Temp (Name is nonexistent or not a directory).

and

 >>mex.getCompilerConfigurations

Error using mex.getCompilerConfigurations (line 60) A 'Selected' compiler was not found. You may need to run mex -setup.

even i have installed

Microsoft Windows SDK 7.1 and mircosoft visual studio 2010 professional

and more over i have reinstalled matlab 2-3 times,even i tried 32 bit and 64 bit also but same errors persisting. please help me to sort out the problem..

Answer 1

[Kaustubha Govind]

The error:

Caused by: Error using cd Cannot CD to C:\Users\MOHANK~1\AppData\Local\Temp (Name is nonexistent or not a directory).

Suggests that your Windows environment variable TEMP is set to C:\Users\MOHANK~1\AppData\Local\Temp which is a non-existing directory. You can either manually create that directory and try again, or edit your environment variable to point to a directory that exists, then restart MATLAB and try again.

[Mohan]

please can u suggest how to create it or edit..

[Mohan]

Thank you very much. problem has been resolved. i created environment variable..now i can set compiler i. e. mex -setup working...

[Khalid gANI]

please TELL ME MOHAN HOW DID U CHANGE THE ENVIRONMENT VARIABLE. ME ALSO FACING THE PROBLEM

[Masoumeh Azarpour]

I have also the same problem, could you please let me know how you could create environment variable? Thank you!

[Dani Tormo]

Here is explained how to change environment variables:

http://support.microsoft.com/kb/310519

Cheers!