How To Fix /IWBEP/CM_SBMC_MPC016 - ABAP field name is not specified for input parameter '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_SBMC_MPC -

• Message number: 016

• Message text: ABAP field name is not specified for input parameter '&1'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_SBMC_MPC016 - ABAP field name is not specified for input parameter '&1' ?

  The SAP error message /IWBEP/CM_SBMC_MPC016 indicates that there is an issue with an input parameter in an OData service, specifically that an ABAP field name is not specified for the input parameter. This error typically arises in the context of SAP Gateway and OData services when the service definition is not correctly configured.
  Cause:
  
  Missing Field Mapping: The input parameter in the OData service is not mapped to a corresponding ABAP field in the backend system.
  Incorrect Service Definition: The service definition in the Service Builder (transaction SEGW) may be incomplete or incorrectly defined.
  Model Issues: There may be issues with the data model or entity type definitions that do not properly define the expected input parameters.
  Code Issues: If there is custom code involved (e.g., in the DPC or MPC classes), it may not be handling the input parameters correctly.
  
  Solution:
  
  
  Check Service Definition:
  
  Go to transaction SEGW and open the relevant project.
  Verify that all input parameters are correctly defined and mapped to the corresponding ABAP fields.
  Ensure that the parameter names match those expected in the OData service.
  
  
  
  Update Model:
  
  If you have made changes to the data model, ensure that you regenerate the runtime artifacts. This can be done by right-clicking on the project and selecting "Generate Runtime Objects".
  
  
  
  Check DPC and MPC Classes:
  
  Review the implementation of the Data Provider Class (DPC) and Model Provider Class (MPC) to ensure that they are correctly handling the input parameters.
  Make sure that the methods that handle the OData requests are correctly implemented and that they reference the correct fields.
  
  
  
  Test the Service:
  
  After making changes, test the OData service using the SAP Gateway Client (transaction /IWFND/GW_CLIENT) or a REST client to ensure that the error is resolved.
  
  
  
  Check for Transport Issues:
  
  If the service was transported from one system to another, ensure that all dependencies and related objects were also transported correctly.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SEGW: Service Builder for OData services.
  /IWFND/GW_CLIENT: Gateway Client for testing OData services.
  SE80: Object Navigator for checking related objects.
  
  
  
  Documentation: Refer to SAP Help documentation on OData services and the SAP Gateway for detailed guidance on service creation and troubleshooting.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  
  
  By following these steps, you should be able to identify and resolve the issue causing the error message /IWBEP/CM_SBMC_MPC016.