System.InvalidOperationException: Sequence contains no elements

[ryanccurtis]

Any time I try to upload an .fbx file to the track editor, I get an error that the sequence contains no elements. What can I do this fix this?

[Litronom]

Your meshes have to be parented to objects with certain names:
Course Master Objects for the visual mesh.
Section 1, Section 2, etc. for collision meshes - which are also used to cull out parts of the visual mesh, depending on which section you are currently on.
Those parent objects can be whatever shape you want. Simple cubes are enough, as long as the names are correct.