Well, subtracting the length doesn't do much, you aren't actually accessing the array block, you are just changing the reference (which lives in thread-local storage). I kind of feel like the whole entity table thing is not correct anyway. Did you (Mike) also comment out the did call? Because that looks more suspicious to me. What it is doing is going through all the entities from the removed one on and setting their id to 1 less. HOWEVER, it's not actually moving the entities down in the array.

I suspect there is a memory access violation or some other issue that's causing it to crash rather than exit normally.

Thank you very much. The program runs successfully now.