.MEX file Segmentation Violation

Hi All,

I have a program I want to edit: adm1_ODE.c (I 'think' this program is already standard and widespread), I wanted to add inputs so I simply changed parameter in line: ssSetNumContStates(S, 43); /* number of continuous states*/. All I did is change 42 to 43. However when I run the program, this results to Matlab System Error and the details state segmentation violation. Any clue/suggestion? Thanks in advance!

Answer 1

[Jan]

Beside setting the number of state, you have to define the new state also. You can use either a debugger for the C-code or set some mexPrintf commands in the code until you find the line, which causes the crash.

[Kaustubha Govind]

I second Jan's suggestion to debug your S-function. Here are some instructions: http://www.mathworks.com/help/toolbox/simulink/sfg/bq2rjeu-1.html

There could be something you're doing wrong in accessing the states.