[LE] Nif file crashes CK

[ElfyPers0n]

I made a few tweaks to a house nif in Blender, but after exporting to a nif and trying to load into the Creation Kit the CK just crashes. I tried checking the EditorWarnings.txt file and there's nothing there.

 

Here's the file in question: https://drive.google.com/open?id=0ByQECnFP8q9rMUxmRWNJMnRyRUU

(I know there's no collision; I'll worry about that later.)

 

Any ideas what might be wrong with it?

 

Also, I'm using Blender 2.78, since 2.49 isn't working for me. However, similar meshes have exported fine for others using 2.78, so I'm not sure if that's the issue.