/IWFND/CM_RS004 - Wrong external-ID type

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_RS -

• Message number: 004

• Message text: Wrong external-ID type

Self-Explanatory Message

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AnswerBot

• What is the cause and solution for SAP error message /IWFND/CM_RS004 - Wrong external-ID type ?

  The SAP error message /IWFND/CM_RS004 Wrong external-ID type typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a mismatch in the expected type of the external ID being used in a request. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause
  
  Mismatched Data Types: The external ID being sent in the request does not match the expected data type defined in the OData service. For example, if the service expects a numeric ID but receives a string, this error can occur.
  Incorrect Mapping: The mapping of the external ID in the OData service might not be correctly defined, leading to type mismatches.
  Service Configuration Issues: There may be issues in the configuration of the OData service or the underlying data model that lead to this error.
  Client-Side Issues: The client application making the request may be sending the wrong type of data for the external ID.
  
  Solution
  
  Check the OData Service Definition: Review the OData service definition in the SAP Gateway to ensure that the external ID is correctly defined with the expected data type.
  Validate the Request Payload: Inspect the request payload being sent to the OData service. Ensure that the external ID matches the expected type (e.g., if it should be an integer, ensure it is not being sent as a string).
  Debugging: Use transaction /IWFND/ERROR_LOG to check for detailed error logs related to the OData service. This can provide more context on what went wrong.
  Adjust Client Code: If the request is being made from a custom application or frontend, ensure that the code sending the request is correctly formatting the external ID.
  Test with Postman or SAP Gateway Client: Use tools like Postman or the SAP Gateway Client to manually test the OData service with the correct parameters to see if the error persists.
  
  Related Information
  
  SAP Gateway: Understand the architecture and components of SAP Gateway, as this error is related to the OData service layer.
  OData Protocol: Familiarize yourself with the OData protocol and how it handles entity IDs and types.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review the official SAP documentation for OData services and SAP Gateway for best practices in defining and consuming services.
  
  By following these steps, you should be able to identify the root cause of the /IWFND/CM_RS004 Wrong external-ID type error and implement a solution.