Debugging C S Functions from X Code

Dear Srs.,

I am trying to debug a C S Function called from simulink in X Code invironment. I was able to debug the c file yprime.c following the steps described on the following link: https://www.mathworks.com/help/matlab/matlab_external/debugging-on-mac-platforms.html#d120e25144

I have tried the same steps for debugging a c S Function called from a simulink project. However, the simulation is completed without stopping at any of the breakpoins I have set. It seems the steps described by the link above allow a c code to be debugged when called directly in MATLAB window, but not when called from a simulink S Function block. How could I debug c S Functions files using X Code?

Thank you very much