How To Fix /IWBEP/CM_V4_RUNTIME095 - $$deltatoken not allowed for non-collection response

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_RUNTIME -

• Message number: 095

• Message text: $$deltatoken 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_RUNTIME095 - $$deltatoken not allowed for non-collection response ?

  The SAP error message /IWBEP/CM_V4_RUNTIME095 $$deltatoken not allowed for non-collection response typically occurs in the context of OData services when there is an attempt to use a delta token in a response that is not a collection. This error is related to the OData protocol, which is used for building and consuming RESTful APIs.
  Cause:
  The error arises when:
  
  A request is made to an OData service expecting a delta response (which includes changes since the last request).
  The service is returning a single entity or a non-collection response instead of a collection of entities.
  The delta token is only applicable for collection responses, and using it in a non-collection context leads to this error.
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Check the Request Type: Ensure that the request being made is appropriate for the expected response. If you are expecting a collection, make sure that the request is targeting a collection endpoint.
  
  
  Modify the Service Implementation: If you are developing or maintaining the OData service, ensure that the service correctly handles delta queries. If a delta token is being requested, the service should return a collection response.
  
  
  Review the OData Version: Ensure that the OData service is compliant with the version you are using. Different versions of OData may have different rules regarding delta tokens.
  
  
  Testing with Different Scenarios: Test the service with different scenarios to see if the error persists. For example, try making a request that does not include a delta token to see if the service responds correctly.
  
  
  Consult Documentation: Review the SAP documentation related to OData services and delta handling to ensure that your implementation aligns with best practices.
  
  
  Debugging: If you have access to the backend, consider debugging the OData service to see how it processes the request and what response it generates.
  
  
  Related Information:
  
  OData Protocol: Understanding the OData protocol and its handling of delta queries can provide insights into how to structure requests and responses correctly.
  SAP Gateway: If you are using SAP Gateway, familiarize yourself with its capabilities and limitations regarding OData services.
  SAP Community: Engaging with the SAP Community or forums can provide additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.