cannot delete file after complie using mex

I complied cpp file using "mex",and created ".mexw64" file, then I modified my cpp file, but a problem occured at this time.

   Error using mex
        LINK : fatal error LNK1104: cannot open file“matrixMultiply.mexw64”

when I tried delete “matrixMultiply.mexw64", another problem occured:

    Warning: File not found or permission denied

I do like this when complie:

    blaslib = fullfile(matlabroot,'extern','lib',computer('arch'),'microsoft','libmwblas.lib');
    mex('-v', '-largeArrayDims', 'matrixMultiply.cpp', blaslib);

how can I fix it?

Answer 1

[Jan]

This problem occurres, when the mexw64 file is used by another instance of Matlab. Run

clear matrixMultiply

in these Matlab sessions, or close these sessions.

[lz liu]

I tried clear matrixMultiply,then when I deleted matrixMultiply.mexw64,the problem still occured.

     Warning: File not found or permission denied

[xingxingcui]

Similar question, how can I solve it?

"The operation could not be completed because the file was already open in MATLAB"