How To Fix /IWBEP/SBDSP_DM018 - In Update operations only Input mapping direction is allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/SBDSP_DM -

• Message number: 018

• Message text: In Update operations only Input mapping direction is allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/SBDSP_DM018 - In Update operations only Input mapping direction is allowed ?

  The SAP error message /IWBEP/SBDSP_DM018 typically occurs in the context of OData services when there is an issue with the mapping direction of the input parameters during update operations. This error indicates that the system expects only input mapping direction for the parameters involved in the update operation, but it has encountered a different configuration.
  Cause:
  
  Incorrect Mapping Configuration: The error usually arises when the mapping for the input parameters in the OData service is not set correctly. For update operations, the parameters should be defined with the input mapping direction.
  Service Definition Issues: If the OData service is not properly defined or if there are inconsistencies in the service metadata, it can lead to this error.
  Incompatible Data Types: If the data types of the input parameters do not match the expected types in the backend, it can also trigger this error.
  
  Solution:
  
  
  Check Mapping Configuration:
  
  Go to the OData service definition in the SAP Gateway Service Builder (transaction code SEGW).
  Ensure that the input parameters for the update operation are correctly defined with the input mapping direction.
  Make sure that the parameters are not mistakenly set as output parameters.
  
  
  
  Review Service Metadata:
  
  Regenerate the service metadata to ensure that it reflects the current state of the service definition.
  You can do this by right-clicking on the service in the Service Builder and selecting "Generate Runtime Objects".
  
  
  
  Validate Data Types:
  
  Check the data types of the input parameters in the OData service and ensure they match the expected types in the backend.
  If there are discrepancies, adjust the data types accordingly.
  
  
  
  Test the Service:
  
  After making the necessary changes, test the OData service using tools like Postman or the SAP Gateway Client (transaction code /IWFND/GW_CLIENT) to ensure that the update operation works as expected.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system is up to date with the latest support packages and notes, as there may be fixes related to OData services in newer versions.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to OData services and the specific error message for any known issues or additional guidance.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Refer to the official SAP documentation on OData service development for best practices and guidelines.
  
  By following these steps, you should be able to resolve the error message /IWBEP/SBDSP_DM018 and successfully perform update operations in your OData service.