Simulink exportation in C/C++ : output array size

Hi,

I have a question : I made an exportation of a Simulink model in C/C++ and it works. When I run the executable file, a .MAT file is create with my output. But each output array is the same size (1024) ?

I see that in rt_logging.c there is a #define DEFAULT_BUFFER_SIZE 1024 but i don't want a fix size value. I would know if there is a way to get the right array size value ??

Many Thanks !

Senn Julien