How To Fix /IWBEP/CM_V4_RUNTIME120 - Batch Error: child request '&1' not found within root request

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_RUNTIME -

• Message number: 120

• Message text: Batch Error: child request '&1' not found within root request

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_RUNTIME120 - Batch Error: child request '&1' not found within root request ?

  The SAP error message /IWBEP/CM_V4_RUNTIME120 Batch Error: child request '&1' not found within root request typically occurs in the context of OData services when using batch processing. This error indicates that a child request (a request that is part of a batch request) could not be found or is not properly linked to its parent (root) request.
  Causes:
  
  Incorrect Request Structure: The batch request may not be structured correctly, leading to the child request not being recognized.
  Missing or Incorrect IDs: The child request might be referencing an ID or a resource that does not exist or is not correctly specified.
  Service Implementation Issues: There may be issues in the implementation of the OData service that prevent the child request from being processed correctly.
  Concurrency Issues: If multiple requests are being processed simultaneously, there might be conflicts or timing issues that lead to this error.
  Network Issues: Intermittent network issues could cause requests to be lost or not properly transmitted.
  
  Solutions:
  
  Check Batch Request Format: Ensure that the batch request is correctly formatted according to the OData specifications. Each child request should be properly nested within the batch request.
  Validate IDs and URIs: Verify that all IDs and URIs used in the child requests are correct and correspond to existing resources.
  Review Service Implementation: Check the implementation of the OData service for any issues that might prevent the child request from being processed. Look for any error handling or logging that might provide more context.
  Test with Single Requests: If possible, test the child requests individually to ensure they work outside of the batch context. This can help isolate the issue.
  Check for Concurrency Issues: If multiple requests are being sent at the same time, try to serialize the requests to see if that resolves the issue.
  Monitor Network Stability: Ensure that there are no network issues that could be affecting the transmission of requests.
  
  Related Information:
  
  OData Batch Processing: Familiarize yourself with how batch processing works in OData, including the structure of batch requests and how child requests are linked to root requests.
  SAP Notes and Documentation: Check SAP Notes for any known issues or patches related to this error. SAP's official documentation on OData services may also provide insights.
  Debugging Tools: Use debugging tools available in SAP (like transaction codes such as /IWFND/ERROR_LOG) to get more detailed error logs that can help diagnose the issue.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution. If the problem persists, consider reaching out to SAP support for further assistance.