Missing mexopts.bat in R2014a for OpenCV link

I am trying to link Matlab R2014a with OpenCV2.4.9 following the procedure here , and/or here . Both require modification of mexopts.bat. Where is mexopts.bat located in R2014a? using fullfile(prefdir,'mexopts.bat') returns this path C:\Users\<User Name>\AppData\Roaming\MathWorks\MATLAB\R2014a\mexopts.bat. but no such file exist in this directory.

Following the advice here I was also looking for the following files mex_C_win64.xml or MBUILD_C_win64.xml , which are matlab informs me are at the same path, but these files also do not exist in this folder (or elsewhere).

Does any one have a suggestion? Alternatively, has anyone succeeded in linking Matlab2014 with OpenCV and willing to share procedure? Much appreciated.

[Mark]

I too would like to know the answer to this.