Here's some context to the 4 digit codes returned by the API:

General

ErrorCode

ErrorEnum

Meaning

1001

NotFound

The specified entity is not found

1002

ArgumentNullOrEmpty

A required parameter has been omitted.

1003

BadArgumentException

A required parameter is malformed.

1004

ConfigurationException

An invalid Configuration has been referenced.

1005

NotImplementedException

A requested resource or action has no implementation.


Orders and catalogs

ErrorCode

ErrorEnum

Meaning

2001

PriceInvalid

The supplied price is malformed, or inconsistent.

2002

DateTimeInvalid

The supplied datetime is malformed, or inconsistent.

2003

PaymentCannotBeProcessed

The payment cannot be processed. More information is provided as part of the message in context.


Flights, cities and airports

ErrorCode

ErrorEnum

Meaning

3001

OriginDestinationInvalid

The requested origin, or destination of the flight is malformed or non existent.

3002

IataInvalid

The supplied IATA code is malformed or non existent.

3003

GeoLocationInvalid

The geography supplied is malformed.

3004

FlightsInThePast

The requested flight exists in the past. Only present and future flights are available.

3005

FlightNumberInvalid

The supplied flight number is malformed.


Users

ErrorCode

ErrorEnum

Meaning

4001

EmailInvalid

The provided email is malformed.

4002

UserExists

An attempt was made to create a user already existing in the system.