How To Fix /IWBEP/CM_MGW_RT183 - Is-Not-Modified must have the same values in all nodes for data provider

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 183

• Message text: Is-Not-Modified must have the same values in all nodes for data provider

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_RT183 - Is-Not-Modified must have the same values in all nodes for data provider ?

  The SAP error message /IWBEP/CM_MGW_RT183 Is-Not-Modified must have the same values in all nodes for data provider typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a mismatch in the values of the "Is-Not-Modified" header across different nodes in the response. This can happen when the OData service is trying to return data that has not changed, but the values being returned are inconsistent.
  Causes:
  
  Inconsistent Data: The data being fetched from the backend may have different values for the same entity across different nodes, leading to inconsistency.
  Caching Issues: If the data is cached, there might be stale data being returned from different nodes.
  Service Implementation: The OData service implementation may not be correctly handling the "Is-Not-Modified" logic, leading to discrepancies in the response.
  Concurrency Issues: If multiple transactions are modifying the same data simultaneously, it can lead to inconsistent states being read by the OData service.
  
  Solutions:
  
  Check Data Consistency: Ensure that the data being fetched is consistent across all nodes. You may need to review the underlying database or data model to ensure that the data is uniform.
  Review OData Service Implementation: Check the implementation of the OData service to ensure that it correctly handles the "Is-Not-Modified" logic. This may involve reviewing the code in the service and ensuring that it returns consistent values.
  Clear Cache: If caching is being used, try clearing the cache to ensure that the latest data is being fetched.
  Debugging: Use debugging tools to trace the execution of the OData service and identify where the inconsistency is occurring. This may involve checking the backend logic and the data being returned.
  Update Service Metadata: If there have been changes to the data model, ensure that the service metadata is updated accordingly.
  
  Related Information:
  
  SAP Gateway: This is the framework that allows you to connect devices, environments, and platforms to SAP systems. Understanding how it handles OData services can help in troubleshooting.
  OData Protocol: Familiarize yourself with the OData protocol, especially how it handles caching and the "Is-Not-Modified" header.
  SAP Notes: Check for any relevant SAP Notes or documentation that may address this specific error or provide guidance on best practices for implementing OData services.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.