The files
* msvc120engmatopts.bat
* msvc120opts.bat
* msvc120opts.stp
should be copied to C:\Program Files\MATLAB\R2013a\bin\win64\mexopts .
The files
* msvc120compp.bat
* msvc120compp.stp
should be copied to C:\Program Files\MATLAB\R2013a\bin\win64\mbuildopts .