S-function and lapack

Hello,

I'm trying to implemet a S-function that does the weighted-least quare control allocation (WLS).

The files provided contain a mex function implementation of the method, the only thing that I did is to change the int type in wlsc_alloc to mwSignedIndex to prevent compatibility issues (just compiling the code of the toolbox and use it was making my MATLAB crash).

Now I want to use that code in S-function.

I set up my problem but when I'm calling a function of lapack MATLAB crashes again.

Since I'm quite new to S-function and mex compilation can you help me to find out the problem.

I'll paste a snippet of the code:

k,m,ione=1 are mwSignedIndex

u,W,iter are double*

	k=1;
	m=1;

	/* Allocate space for output variables */
	mxArray *u_out = mxCreateDoubleMatrix(m, 1, mxREAL);
	mxArray *W_out  = mxCreateDoubleMatrix(m, 1, mxREAL);
	mxArray *iter_out  = mxCreateDoubleMatrix(1, 1, mxREAL);
    
    /* Create pointers to output variables */
	u    = mxGetPr(u_out);
	W    = mxGetPr(W_out);
	iter = mxGetPr(iter_out);
    

	/* Copy initial values of u and W */
	DCOPY(&m,u0,&ione,u,&ione); /* u = u0 */

Thank you,

Alex