Pokémon Model Ripping Project

[mem0ry]

When I try to import larger field maps from PMLG (area06/town007_00, area02/town001_00 for example) some texture fails to load. According to 3DS Max "null.png" is missing, it works with the room map models but I always experience this issue when I try to import a larger field map model, any idea why this happens?