How To Fix /IWBEP/CM_V4_RUNTIME050 - Current expand level does not include navigation property '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_RUNTIME -

• Message number: 050

• Message text: Current expand level does not include navigation property '&1'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_RUNTIME050 - Current expand level does not include navigation property '&1' ?

  The SAP error message /IWBEP/CM_V4_RUNTIME050 Current expand level does not include navigation property '&1' typically occurs in the context of OData services when a client requests to expand a navigation property that is not included in the current expand level of the OData service.
  Cause:
  
  
  Expand Level Configuration: The error indicates that the navigation property specified (represented by &1) is not part of the current expand level defined in the OData service. This can happen if the client request is trying to expand a property that is not allowed or not configured to be expanded at the current level.
  
  
  Service Definition: The OData service may not have been defined to allow the expansion of that particular navigation property. This could be due to restrictions in the service definition or the way the entity relationships are set up.
  
  
  Client Request: The client may be sending a request that includes an expand query option for a navigation property that is not available in the current context.
  
  
  Solution:
  
  
  Check the OData Service Definition: Review the service definition in the SAP Gateway Service Builder (transaction code SEGW) to ensure that the navigation property is defined and allowed to be expanded. If it is not, you may need to modify the service definition to include it.
  
  
  Adjust the Expand Level: If the navigation property is defined but not included in the current expand level, you may need to adjust the expand level in your OData service configuration. This can involve modifying the service implementation to allow for deeper expansions.
  
  
  Modify Client Request: If the navigation property is not intended to be expanded, modify the client request to remove the expand option for that property. Ensure that the request aligns with the capabilities of the OData service.
  
  
  Check Metadata: Use the $metadata endpoint of the OData service to check the available navigation properties and their expandability. This can help you understand what is allowed in your current context.
  
  
  Debugging: If you have access to the backend, you can debug the OData service to see how the request is being processed and where it fails. This can provide insights into whether the issue is with the service definition or the client request.
  
  
  Related Information:
  
  OData Documentation: Familiarize yourself with OData specifications and how navigation properties work. This can help in understanding the limitations and capabilities of your OData service.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide guidance on handling navigation properties in OData services.
  Community Forums: Engage with SAP community forums or support channels for additional insights or similar cases that might provide solutions.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service functions as expected.