How To Fix DAAG_REST_HANDLER006 - Parameter &1 in view &2 can only have a single value

SAP Error Message - Details

• Message type: E = Error

• Message class: DAAG_REST_HANDLER - Data Aging Restriction Handler

• Message number: 006

• Message text: Parameter &1 in view &2 can only have a single value

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 DAAG_REST_HANDLER006 - Parameter &1 in view &2 can only have a single value ?

  The SAP error message DAAG_REST_HANDLER006 indicates that a parameter in a specific view is expected to have a single value, but it has been provided with multiple values. This typically occurs in the context of OData services or RESTful APIs when the request sent to the service includes a parameter that is not configured to accept multiple values.
  Cause:
  
  Multiple Values Passed: The most common cause of this error is that the client (e.g., a frontend application or another service) is sending multiple values for a parameter that is defined to accept only a single value in the OData service.
  Incorrect URL Structure: The URL used to call the OData service might be incorrectly structured, leading to the interpretation of a parameter as having multiple values.
  Service Definition: The OData service definition may not be set up to handle multiple values for that parameter, which is a common scenario in SAP Gateway services.
  
  Solution:
  
  Check the Request: Review the request being sent to the OData service. Ensure that the parameters are being sent correctly and that no parameter is being passed multiple times or with multiple values.
  Modify the Client Logic: If the client application is sending multiple values, modify the logic to ensure that only a single value is sent for the parameter in question.
  Service Configuration: If the requirement is to allow multiple values for that parameter, you may need to adjust the service definition in the SAP Gateway. This could involve:
  
  Modifying the data model to allow for multiple values.
  Adjusting the service implementation to handle multiple values appropriately.
  
  
  Testing: After making changes, test the service again to ensure that the error is resolved.
  
  Related Information:
  
  OData Services: Understanding how OData services work in SAP can help in troubleshooting such issues. Familiarize yourself with the service metadata and how parameters are defined.
  SAP Gateway: If you are working with SAP Gateway, you may want to look into the transaction codes like /IWFND/MAINT_SERVICE to manage your OData services.
  Debugging: Use transaction codes like SE80 or SE37 to debug the service implementation and see how parameters are being processed.
  Documentation: Refer to SAP documentation for OData services and RESTful APIs for best practices and guidelines on parameter handling.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.