HaloMods "Classic" Read-only Archive

Ok when i try to build stuff sometimes i get

### ERROR edge #(whatever number) is YZxy (red). Now i heard to fix it you delete the face then rebuild them by clicking Polygon then crate. But whenever i do this i still come up with an error. I heard theres i trick around this. Does anyone know the tricck or does anyone know a better way to fix it.

YZxy is supposed to be open

Unless it's a map, you can just make a different model for collison that doesn't need to be sealed.
Other than that, import the WRL file in the Halo CE folder. (if it's a BSP, it will have the name of the map, if it's just a model, it'll be debug.wrl)

ok lets jus go with model. I downloaded d40_armory. I opened it in 3DS Max 8 and cut away the sealed area where there are supposed to be the doors. I saved it as a .JMS then i built the model perfectly fine but the collision-geometry had the errors. How do i fix that.