Matlab mex file crashes on windows - cannot debug

Question

I have a mex-file I compiled

>> mex -g myMex.cpp

I ran it on several inputs and it works just fine.
All of a sudden, for a specific input, it crashes the machine!

Following the instructions on how to debug using visual studio I attached the debuger to Matlab process and put a break-point at the first line of my mexFunction .

However, when I tired to debug visual studio and Matlab crashes before the break point is hit in the mex C++ code!

Has anyone encountered such a frustrating behavior? How can I debug this crash if the crash happens before I can stop in the debugger?

Answer 1

Not really the answer you're looking for, but due to issues similar to the one you describe I've always found visual debugging of Matlab MEX files so fiddly as to be more trouble than it's worth. It may be quicker to track down problems by inserting mexPrintf and/or return statements in the main mexFunction routine.