How To Fix /IWBEP/CM_V4_RUNTIME093 - $$skiptoken not allowed for non-collection response

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_RUNTIME -

• Message number: 093

• Message text: $$skiptoken not allowed for non-collection response

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_RUNTIME093 - $$skiptoken not allowed for non-collection response ?

  The SAP error message /IWBEP/CM_V4_RUNTIME093 $$skiptoken not allowed for non-collection response typically occurs in the context of OData services when a client attempts to use the $skiptoken query option on a response that is not a collection. This error indicates that the service is expecting a collection of items (like an array of records), but the response being returned is a single entity or a non-collection type.
  Cause:
  
  Incorrect Query: The client is trying to paginate through a single entity response using $skiptoken, which is only applicable for collection responses.
  Service Definition: The OData service might be incorrectly defined, where a collection endpoint is expected but is returning a single entity instead.
  Data Model: The underlying data model may not support pagination for the specific entity being queried.
  
  Solution:
  
  
  Check the Query: Ensure that the query being sent to the OData service is targeting a collection endpoint. If you are querying a single entity, remove the $skiptoken from the request.
  
  
  Review Service Metadata: Look at the OData service metadata (usually accessible via the $metadata endpoint) to confirm whether the endpoint you are calling is defined as a collection or a single entity.
  
  
  Modify the Service: If you need pagination for a specific entity, consider modifying the OData service to return a collection instead of a single entity. This may involve changing the service implementation or the way the data is being fetched.
  
  
  Use Correct Endpoints: If you are trying to retrieve a list of items, ensure you are using the correct endpoint that returns a collection. For example, instead of calling an endpoint that returns a single item, call the one that returns a list of items.
  
  
  Related Information:
  
  OData Protocol: Familiarize yourself with the OData protocol, especially how it handles collections and pagination. The $skiptoken is specifically designed for paginating through collections.
  SAP Gateway: If you are working with SAP Gateway, ensure that your service is properly configured to handle collections and that the data model supports the operations you are trying to perform.
  Debugging: Use tools like Postman or SAP Gateway Client to test your OData service and see the raw responses. This can help you identify whether the issue is with the request or the service implementation.
  
  By following these steps, you should be able to resolve the error and ensure that your OData queries are correctly structured for the responses you expect.