HaloMods "Classic" Read-only Archive

I'm having the same error everytime i try to import a model with darkmatter. object reference not set to an instance of an object.
I saw a post about this, but there was no solution. it should have something to do with .net framework being written by microsoft or something.

Are there any model programs that don't use .net framework? If not then are there any other model importers/exporters for halo 2 maps?

Most modding programs here as well as modeling programs are built on .NET framework.

Plus, darkmatter sucks for model extraction and injection.
Use Entity instead.
Here is a good tutorial for model extraction/injection.