(2019-07-27, 23:18)Willy Tschager Wrote: Believe it or not I don't remember this!
According to the OMR Spec:
https://www.ldraw.org/article/593.html
the file name should be something like:
5540 - Formula I Racer - A Model.mpd
5540 - Formula I Racer - B Model.mpd
Did you run it through MPDCenter or tried https://brickhub.org/ which also gives you some clues?
w.
It'll get fixed when it's added to the OMR. Just remember for the future.