SSH and MEX: Assertion default???!!

Hello everybody, I'm working with Matlab 2011a on linux 64bit, I got an assertion error calling a mex function, a system() method, another time the mex and then the system(), as following:

Init = ElaborateModelRFAll(I, 50); %function which contains a calling to a mex
disp('first');
system('ssh jotunn "qsub cluprocess_RF.sh"');
disp('second');
Init = ElaborateModelRFAll(I, 50); %function which contains a calling to a mex
disp('third');
system('ssh jotunn "qsub cluprocess_RF.sh"');
disp('fourth');

the result is till the third text displayed, then it crashes (assertion fault) when it calls the second time the system()... Why? It's because I called the second MEX!! Can anybody give to me a reasonable answer of this unbelievable behavior???!! Thanks, Matt

Answer 1

[Walter Roberson]

The usual reason for something like this is that there is a bug in the mex file that is corrupting MATLAB's internal memory in such a way that the corruption happens to be critical the next time system() is called.

[Kaustubha Govind]

Mett: If you have access to the source code, I would recommend debugging it to find the cause of the SegV (http://www.mathworks.com/help/techdoc/matlab_external/f32489.html). If you don't have the source code, you should contact the vendor.