Terrain bug?

I was recently doing some unit editing on my map, and then go to "test map" to see how I did. However, TFT froze near the end of the loading. Pretty confused, I tried again, and it froze in the same spot again. So I decide to restart TFTWE, only to get this error message.



I get this on ANY map that contains that specific peice of terrain, and any map that has that peice of terrain, won't load in TFT either. I have NO idea why it would do this, considering I didn't even TOUCH the terrain files. I wouldn't touch them with a 10 foot pole even. All I did was just work on my map, which just so happens to have this specific peice of terrain.