Call "set_param" from C-MEX S-function

Hi,

I am currently trying to stop my simulink model execution from a C-MEX S-Function.

I'm trying to call "set_param" from mexCallMATLAB.

However, the documentation about this function is terrible: very little and complex example, and sometimes the function is not even refered in the example.

My code for now is the following:

mxArray *cell_array_ptr;

  /* Create a nrhs x 1 cell mxArray. */ 
  cell_array_ptr = mxCreateCellMatrix((mwSize)nrhs,1);

  /* Fill cell matrix with input arguments */
  mxSetCell(cell_array_ptr,(mwIndex)0,mxCreateString("gcs"));
  mxSetCell(cell_array_ptr,(mwIndex)1,mxCreateString("SimulationCommand"));
  mxSetCell(cell_array_ptr,(mwIndex)2,mxCreateString("stop"));

  /* Call mexCallMATLAB to display the cell */
  mexCallMATLAB(0,NULL,3,&cell_array_ptr,"set_param");

This causes Matlab to crash. Basicaly, I think I am stucked on the "Array of pointers to input arguments" construction and I need to understand exactly what it is and how to construct it.

I'm not looking for something overkill or over beautiful, elegant code, just something that works and that I can put into a function.

Thanks