address

I try to get a entitylist and already found one. The only problem is that i dont know how many Entitys will be there. Somehow when i generate the addresses for the 1000 entitys i list there everything works. But when i change the health the game crashes when the end of the entitylist is reached...

Here are my problems: 1. found players position in a game world(2D game made in java - wakfu) , but Im not able to find a base address for it. When I try to track down the base address via cheat engine with "see what's accessing this pointer" method, after a few levels no new addresses are shown...