How can I free memory using pointers in mexfiles

Hello, I'm using a MEXfile C++ code for an optimization task. I noticed that memory is not freed at each iteration of the optimization, so after a number of iterations MATLAB crashes due to a no memory space error (RAM memory in Task Manager is completely full). As I'm new in programming MEXfiles I have low experience in this kind of memory errors. I tried to delete the memory stored in pointers but I couldn't manage to solve the problem. I thought the cause of this issue could be that pointers don't free the memory stored, but I'm not sure completely.

Here is my mexFunction code:

 void mexFunction(int nlhs, mxArray *plhs[],
          int nrhs, const mxArray *prhs[])
  {
      double *a, *b, *c, *d, *f;

      int status,mrows,ncols; 

      /* Create a pointers to the input matrices. */
      a = mxGetPr(prhs[0]);
      b = mxGetPr(prhs[1]);
      c = mxGetPr(prhs[2]);
      d = mxGetPr(prhs[3]);

      /* Get the dimensions of the input matrices. */
      mrows = mxGetM(prhs[0]);
      ncols = mxGetN(prhs[0]);

      /* Set the output pointer to the output matrix. */
      plhs[0] = mxCreateDoubleMatrix(mrows,ncols, mxREAL);

      /* Create a C pointer to a copy of the output matrix. */
      f = mxGetPr(plhs[0]);

      /* Call the C++ subroutine. */
      ID_mexfile_v2(a,b,c,d,f,mrows,ncols);    
  }

The C++ subroutine, is the function in which I treat all the input data with specific libraries of multibody dynamics. I thought it would be better not to make a long piece of code, but I can provide it as well if necessary. I would really appreciate any help or advice.

[James Tursa]

There is nothing in your posted mexFunction code that leaks memory, so any leaking must be in your ID_mexfile_v2 function.