How To Fix /IWFND/MED161 - SAP Gateway service could not be determined with external mapping ID '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/MED -

• Message number: 161

• Message text: SAP Gateway service could not be determined with external mapping ID '&1'

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/MED161 - SAP Gateway service could not be determined with external mapping ID '&1' ?

  The SAP error message /IWFND/MED161 indicates that the SAP Gateway service could not be determined using the specified external mapping ID. This error typically occurs when there is a mismatch or misconfiguration in the service registration or when the external mapping ID does not correspond to any registered service in the SAP Gateway.
  Causes:
  
  Incorrect External Mapping ID: The external mapping ID provided in the request does not match any existing service in the SAP Gateway.
  Service Not Registered: The service associated with the external mapping ID has not been registered or activated in the SAP Gateway.
  Authorization Issues: The user may not have the necessary authorizations to access the service.
  Service Deactivation: The service might be deactivated or not properly configured in the system.
  Transport Issues: If the service was recently transported from another system, it may not have been properly activated in the target system.
  
  Solutions:
  
  Verify External Mapping ID: Check the external mapping ID being used in the request. Ensure it is correct and corresponds to a valid service.
  Check Service Registration:
  
  Go to the SAP Gateway Service Builder (transaction code /IWFND/MAINT_SERVICE).
  Check if the service is listed and activated. If not, you may need to register and activate it.
  
  
  Activate the Service: If the service is not active, select it and activate it in the Service Maintenance screen.
  Check Authorizations: Ensure that the user making the request has the necessary authorizations to access the service.
  Review Service Configuration: Check the service configuration for any issues or misconfigurations that might prevent it from being recognized.
  Transport Issues: If the service was transported, ensure that all necessary components were included in the transport and that the service is properly activated in the target system.
  
  Related Information:
  
  Transaction Codes:
  
  /IWFND/MAINT_SERVICE: Service Maintenance for SAP Gateway.
  /IWFND/GW_CLIENT: Gateway Client for testing OData services.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address known issues related to this error message.
  Logs and Traces: Use transaction /IWFND/ERROR_LOG to check for additional error logs that might provide more context on the issue.
  OData Service Documentation: Review the documentation for the specific OData service you are trying to access for any additional configuration requirements.
  
  By following these steps, you should be able to identify and resolve the issue related to the /IWFND/MED161 error message in SAP Gateway.