FYI, for the AirlineFlightSchedules method the documentation shows two of the inputs as ‘start_date’ and ‘end_date’ but I believe they’re really ‘startDate’ and ‘endDate’.
I just double checked the code, and the parameters for FlightXML3’s AirlineFlightSchedules are start_date and end_date. In FlightXML2 they are startDate and endDate.
My apologies then. I was working from memory but I had tried one method with ‘start_date’ and ‘end_date’ parameters and I got errors on those until I tried it with ‘startDate’ and ‘endDate’. Maybe I was mistakenly using FlightXML2.