Model Viewer crashes on start up.

[GoreGrinder99]

Which modeling program do you use?

If you use Blender, this could mean that you didn't assign materials through the material panel. (Basically the same thing for Maya or 3DS)

Or you forgot to set the export properties correctly. This would be the "Selection Only" & "Include Material Textures" on the left side of Blender when you are exporting.

Yes, it was the export properties, thank you!