Hi 4rwin, the bug is in the automatically generated texture coordinates. If you're not using those you can turn them off by a setting in moi.ini :

[OBJ Export]
<....>
WriteTextureCoordinates=y


Set that to WriteTextureCoordinates=n and then that should avoid the error.

The error is just on 6 lines in the .obj file so it's also possible to edit the file and repair it.

I'll investigate it further to see if I can identify what particular surface triggers the bug and see if I can fix it.

Thanks, - Michael