calendar.txt:
Required column missing from calendar.txt: service_id
routes.txt:
Required column missing from routes.txt: route_id
stops.txt:
Required column missing from stops.txt: stop_id
trips.txt:
Required column missing from trips.txt: route_id
agency.txt:
Unrecognised column in agency.txt: "agency_id"
calendar.txt:
Unrecognised column in calendar.txt: "service_id"
routes.txt:
Unrecognised column in routes.txt: "route_id"
stops.txt:
Unrecognised column in stops.txt: "stop_id"
trips.txt:
Unrecognised column in trips.txt: "route_id"