Thansk a lot high_flyer, but... which debugger? If I run my project by "Start debugging (F5)" from QTCreator, it no crash! How can I see the line code?
In one run of start debugging, it wrote:
Heap corruption detected at 00B33388
Heap corruption detected at 00B33388
Heap [hierarchical.exe]:
Heap: Free heap block b33380 modified at b33390 after it was freed.

..... exited with code 1073807364
Is there any other then I should check?

Thanks a lot for your time.

I'll check my code on that array

thanks.

Michele