Hi Booleano, it has probably been created as a polygon mesh object type inside of Rhino. For it to be used by Moi it needs to be a NURBS object inside of Rhino, not a polygon mesh object.

When you import it into Rhino, I think there is an option there whether to import it as a mesh or trimmed planes, make sure that is set to the "trimmed planes" option.

But if the object is made up of a large number of little tiny planes where it's trying to approximate a curved surface, it may not be suitable data to try and load into Moi at all though.

- Michael