How To Fix /IWFND/COC_SDATA201 - Parameter '&1' does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/COC_SDATA -

• Message number: 201

• Message text: Parameter '&1' does not exist

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/COC_SDATA201 - Parameter '&1' does not exist ?

  The SAP error message /IWFND/COC_SDATA201 Parameter '&1' does not exist typically occurs in the context of SAP Gateway and OData services. This error indicates that a parameter being referenced in an OData service call does not exist in the expected context, which can lead to issues when trying to retrieve or manipulate data.
  Causes:
  
  Incorrect Parameter Name: The parameter name being used in the OData request does not match any of the defined parameters in the service.
  Service Definition Issues: The OData service may not be properly defined or activated, leading to discrepancies in the expected parameters.
  Model Changes: If there have been recent changes to the underlying data model or service definition, the parameters may have been altered or removed.
  Versioning Issues: If you are using a different version of the service than expected, the parameters may differ between versions.
  Typographical Errors: Simple typos in the parameter name can lead to this error.
  
  Solutions:
  
  Check Parameter Names: Verify that the parameter name in your OData request matches exactly with the parameter names defined in the service. Pay attention to case sensitivity and spelling.
  Review Service Metadata: Access the service metadata (usually available at the URL http://<host>:<port>/sap/opu/odata/sap/<service_name>/$metadata) to confirm the available parameters and their definitions.
  Activate/Regenerate Service: If there have been changes to the service, ensure that the service is activated in the SAP Gateway. You can do this in the SAP Gateway Service Builder (transaction code SEGW).
  Check for Model Changes: If there have been changes to the underlying data model, ensure that the OData service has been updated accordingly.
  Test with Different Clients: Sometimes, the issue may be with the client making the request. Test the service using tools like Postman or the SAP Gateway Client (transaction code /IWFND/GW_CLIENT) to isolate the issue.
  Debugging: If you have access to the backend, you can debug the OData service to see where the parameter is being referenced and why it is not found.
  
  Related Information:
  
  SAP Gateway: This is the technology that allows you to connect devices, environments, and applications to SAP systems via OData services.
  OData Services: Open Data Protocol (OData) is a standard protocol for creating and consuming data APIs. Understanding OData conventions can help in troubleshooting issues related to service calls.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SEGW (Service Builder), /IWFND/MAINT_SERVICE (Manage Services), and /IWFND/GW_CLIENT (Gateway Client) for managing and testing OData services.
  
  By following these steps, you should be able to identify and resolve the issue related to the error message /IWFND/COC_SDATA201 Parameter '&1' does not exist.