How To Fix /IWFND/CM_MGW208 - Filter parameter '&1' is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW -

• Message number: 208

• Message text: Filter parameter '&1' is not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW208 - Filter parameter '&1' is not supported ?

  The SAP error message /IWFND/CM_MGW208 Filter parameter '&1' is not supported typically occurs in the context of OData services when a filter parameter that is being used in a request is not recognized or supported by the service. This can happen for several reasons, and here are some common causes, solutions, and related information:
  Causes:
  
  
  Unsupported Filter Parameter: The filter parameter specified in the request is not defined in the OData service's metadata. This could be due to a typo or because the parameter is not exposed by the service.
  
  
  Service Versioning: The OData service might have been updated, and the filter parameter was removed or changed in a newer version.
  
  
  Incorrect OData Query: The OData query might be incorrectly formed, leading to the service not recognizing the filter parameter.
  
  
  Data Model Changes: Changes in the underlying data model (like changes in the database or data structure) that are not reflected in the OData service.
  
  
  Solutions:
  
  
  Check Metadata: Review the OData service metadata (usually accessible via the $metadata endpoint) to confirm that the filter parameter you are trying to use is indeed supported.
  
  
  Correct the Request: If the filter parameter is incorrect, modify your request to use the correct parameter name as defined in the service metadata.
  
  
  Update OData Service: If the service has been updated and the parameter is no longer supported, you may need to adjust your application logic to accommodate the changes.
  
  
  Consult Documentation: Refer to the documentation for the specific OData service you are using to understand the supported parameters and their usage.
  
  
  Debugging: If you have access to the backend, you can enable logging for the OData service to get more detailed error messages that might help in diagnosing the issue.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to SAP support or your internal SAP team for assistance.
  
  
  Related Information:
  
  OData Protocol: Understanding the OData protocol and how it handles queries, filters, and parameters can be beneficial.
  SAP Gateway: Familiarize yourself with SAP Gateway and how it exposes OData services, including how to define and manage filter parameters.
  SAP Community: The SAP Community forums can be a valuable resource for finding similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution.