Error Handling

General Overview of Error Handling

Expectations for Error Handling over SMX

It is expected that your application has a robust error-handling process in place. An error response should contain a short description of the error to assist our Support teams in troubleshooting.

Please read the below to make sure you have a good understanding of the requirements for error handling over SMX for Apps.

Error Responses using the <Errors></Errors> tag will flag the reservation delivery from SMX to your endpoint as Failed.

Content-Type

The ‘Content-Type’ for all SOAP XML messages must be application/xml; charset=utf-8.

Error Responses

Invalid Hotel Code

<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
    <soap-env:Body xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
        <OTA_HotelResNotifRS xmlns="http://www.opentravel.org/OTA/2003/05" Version="1.0" TimeStamp="2025-08-01T09:30:47+08:00" EchoToken="abc123-unique">
          <Errors>
            <Error Type="6" Code="392">Hotel not found for HotelCode=XXXXXX</Error>
          </Errors>
        </OTA_HotelResNotifRS>
    </soap-env:Body>
</soap-env:Envelope>

Invalid Username or Password

<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
    <soap-env:Body xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">       
       <OTA_HotelResNotifRS xmlns="http://www.opentravel.org/OTA/2003/05" Version="1.0" TimeStamp="2025-08-01T09:30:47+08:00" EchoToken="abc123-unique">
          <Errors>
             <Error Type="6" Code="497">Invalid Username and/or Password</Error>
         </Errors>
       </OTA_HotelResNotifRS>
    </soap-env:Body>
</soap-env:Envelope>

Warning Responses

Any other warning responses that are not application or server-level issues should be sent as Success + Warning to avoid reservation delivery failures.

Our Reservations API specifications will have non-mandatory fields/attributes that a Publisher might not send in the reservation XML if it's not supported by them. Publishers should always send the mandatory reservation fields. Please review our OTA_HotelResNotifRQ Specification to view the mandatory and non-mandatory attributes.

Required Information Not Present - Missing email address

<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
    <soap-env:Body xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">       
       <OTA_HotelResNotifRS xmlns="http://www.opentravel.org/OTA/2003/05" Version="1.0" TimeStamp="2025-08-01T09:30:47+08:00" EchoToken="abc123-unique">
			<Success/>
			<Warnings>
				<Warning Type="10" Code="321">Guest email address is required</Warning>
			</Warnings>
			<HotelReservations>
				<HotelReservation>
					<UniqueID ID="LH123456789"/>
					<ResGlobalInfo>
						<HotelReservationIDs>
							<HotelReservationID ResID_Type="10" ResID_Value="LH123456789"/>
						</HotelReservationIDs>
					</ResGlobalInfo>
				</HotelReservation>
			</HotelReservations>          
       </OTA_HotelResNotifRS>
    </soap-env:Body>
</soap-env:Envelope>

Required Information Not Present - Missing phone number

<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
    <soap-env:Body xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">       
       <OTA_HotelResNotifRS xmlns="http://www.opentravel.org/OTA/2003/05" Version="1.0" TimeStamp="2025-08-01T09:30:47+08:00" EchoToken="abc123-unique">
			<Success/>
			<Warnings>
				<Warning Type="10" Code="316">Phone number is required</Warning>
			</Warnings>
			<HotelReservations>
				<HotelReservation>
					<UniqueID ID="LH123456789"/>
					<ResGlobalInfo>
						<HotelReservationIDs>
							<HotelReservationID ResID_Type="10" ResID_Value="LH123456789"/>
						</HotelReservationIDs>
					</ResGlobalInfo>
				</HotelReservation>
			</HotelReservations>          
       </OTA_HotelResNotifRS>
    </soap-env:Body>
</soap-env:Envelope>

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Recommended OTA Error Codes

SMX recommends (but is not limited to) the following error codes from OTA Warning Type (EWT). Any OTA Warning Type can be used.

Error Warning Type (EWT)

Code	OTA Description
1	Unknown
2	No implementation
3	Biz rule
4	Authentication
5	Authentication timeout
6	Authorization
7	Protocol violation
8	Transaction model
9	Authentical model
10	Required field missing
11	Advisory
12	Processing exception
13	Application error

Error Codes (ERR)

Error Codes - General These are recommended (but not limited to) Error Codes to be returned for general errors. Any OTA Error Code (ERR) entry can be used.

OTA Description	Code	Field
187	System currently unavailable
400	Invalid property code	Hotel Code
448	System error
450	Unable to process
497	Authorization error

Error Codes - Updates

These are recommended (but not limited to) Error Codes to be returned for update errors. Any OTA Error Code (ERR) entry can be used.

Code	OTA Description	Usage
16	Invalid date
310	Required data missing: last name
311	Required data missing: first name
316	Required data missing: phone number
321	Required field missing	Used when a required field is missing that does not have a dedicated error code (ie: Room ID required)
375	Hotel not active
392	Invalid hotel code