LoadLevel isn't working, help?

Hey guys, I’m hitting a very thick wall here. All of a sudden my LoadLevel stopped working. Here’s the kind of error I’m getting

Level ‘栀愀椀渀㄀Ⰰⴀ㠀 ⸀㤀Ⰰ㐀㘀㔀⸀㔀㔀Ⰰⴀ㄀⸀㤀㜀㌀Ⰰⴀ ⸀㤀㠀㠀Ⰰ ⸀㤀㠀㤀Ⰰ㄀  簀㄀㈀㈀Ⰰ稀漀’ (-1) couldn’t be loaded because it has not been added to the build settings.
To add a level to the build settings use the menu File->Build Settings…

Yes…chinese characters…or is that japanese? Korean? Dunno but it’s not english.
This error occurs upon a call to
Application.LoadLevelAdditiveAsync(“AssetsDB”);

And the level IS in the build settings, they all are, always were. There seems to be some kind of corruption. Cause it’s very sudden. I tried loading the levels by number, there’s no error but the content of the level isn’t getting loaded. Any help would be appreciated. Is there a way to force a rebuild of everything?

I found the problem. Because I’ve developped an animation system that converts flash animations to a format my FlashToUnity animation component can read, I have this huuuuuuuuuuuuge file that contains all the animation data strings, it seems I hit some kind of character limit or line count limit in that file (over 11k lines). So it started breaking when I added a few missing animation data strings but it was a trivial operation so I didn’t make the connection. I slightly/hackishly altered the animation format to be smaller and it’s all good now.