Hi Andy, what method are you using for importing it into MOI v4, are you trying to process it with the sub-d converter or some other method?

Note that the sub-d importer is designed to work on a mesh that is configured for sub-d smoothing to be applied to it, so it's expecting things like all quads, edge loops, stuff like that. Your file is not set up like that you've got a high density triangle mesh which the sub-d converter is not designed to process.

In general high density triangle meshes are not the type of data that CAD programs are set up to work on directly. You might try the wireframe converter from here though:
https://moi3d.com/resources#Obj23dmWireframe_converter

But generally it is not advisable to try and directly use triangle mesh scan data in a CAD program, it needs to go through a rather complex "reverse engineering" process to have it converted into smooth surfaces used by CAD.

- Michael