Hi, finnally i ve found how to increase memory in macperl so he doesn t crash anymore... launch resedit, open macperl in the icons there is one wich is call "SIZE" open it, the ID is "-1" and the Size is "10", open it , the last item of the list are "Size" and "Min Size": it is here that you increase the memory needed for Macperl (ie size 8388608 minsize 4194304) And then the debug mode run. By the way the debug mode seems to need about 3Mo of ram. Matthias, I m sorry to have done that(i m not a hacker)! I think it will be better to fix the amount of ram needded by the app at the compil time.