Thanks for the reply.The big hash is the most essential part, so really can't change that.

I didn't add any code because I tried many different system calls on different locations in the large script. A system call always worked if I put it before the hash is loaded, if I do it afterwards, it never starts

The code you send, does that hash takes the memory of your variable $memory_eaten? If so, that would be great to test, I will do it now.