Battle Preparations not working after editing chapter data (Nightmare)

I’m really new to hacking/nightmare, and I’m making an edited version of fe6. I tried changing the fog of war vision range on some maps and now those maps don’t have battle preparations. Does anyone know why this is and how I can fix it? I am very new to hacking, so the more detailed the answer, the better.

Thanks.

I have absolutely no idea why this happens, but the solution AFAIK is to just go back and set prep screens for every chapter that usually has them.

How do I set the prep screens? I’m using nightmare for fe6 so “prep screen” isn’t an on/off option in the chapter data editor.

It’s called Chapter Opening. If it begins straight away, there’s no battle preparation. If it says Map Preview, it means there’s a prep screen. Should be in the Chapter Data Editor.

Isn’t there in the fe6 editor. I know it is for fe7 but fe6 doesn’t have it.