Invalid SOAP fault - AirlineFlightSchedules

FlightAware AeroAPI
1

Getting this error

End element 'Fault' from namespace 'http://schemas.xmlsoap.org/soap/envelope/' expected. Found element 'SOAP-ENV:detail' from namespace 'http://schemas.xmlsoap.org/soap/envelope/'. Line 2, position 413.

When trying:

var schedules = client.AirlineFlightSchedules((int)startUnix.ToUnixTimeSeconds(),
                            (int)endUnix.ToUnixTimeSeconds(), String.Empty, String.Empty, airline, String.Empty, 1, 0);

I also tried hardcoding the arguments, per documentation found at: https://flightaware.com/commercial/flightxml/explorer/#op_AirlineFlightSchedules

var scheds = client.AirlineFlightSchedules(1536089816, 1536101000, "KLAX", "KIAH", "UAL",
                                "6879", 1, 0);

Neither of the above are returning results for me.

2

The time range represents dates in 2018. this is well outside of the “recent past” defined by the endpoint. The error statement is:
INVALID_ARGUMENT startDate is too far in the past (3 months)

Searching more recent schedules will work.