Final Fantasy Hacktics

I am at the first (real) battle of chapter one, Magic city, and my game crashes every time i enter the battle, but only after i add a new sprite, then even if i change it back to its base, it still crashes at the same point.

if i dont change any of the data, it plays normally. its only after i change the spr in some way (Even just changing ramza and delita's sprites with eachother) it closes. has anyone had this problem/does anyone know how to fix it?

readfile: buf=030f8c30 len=96 err=30 [reached end of file]
etc etc same thing but the last few numbers of buf change, rest is the same.

fix'd  thanks for the help aura