I'm sorry, I honestly don't know much about amap errors. I was just giving a guess based on the message. My best bet is that somewhere linked into wold battle settings, a pointer is missing or broken. I personally would contack LU-HO, and ask him. Maybe even ask him if he has a list of error messages and their fixes. That would be nice as noone seems to have one.
LU-HO's address is [email protected]