Hello,
The problem comes from the stop.txt file, where on a 6 stop_points whose parent_station is defined on a stop_point (whose stop_id is 41640), whereas it should be defined on a stop_area.
The stop_ids in question are:
41668, 41672, 41675, 41784, 41785 and 47714
cordially
Amine
Support and Application Engineer