How To Fix /IWBEP/CM_CP205 - Expand path '&1' does not end with navigation property

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 205

• Message text: Expand path '&1' does not end with navigation property

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_CP205 - Expand path '&1' does not end with navigation property ?

  The SAP error message /IWBEP/CM_CP205 Expand path '&1' does not end with navigation property typically occurs in the context of OData services when there is an issue with the way the expand query option is being used in an OData request. This error indicates that the specified path in the expand option does not correctly point to a navigation property in the data model.
  Cause:
  
  Incorrect Expand Path: The path specified in the $expand query option does not correspond to a valid navigation property in the OData service's entity model.
  Typographical Errors: There may be a typo in the navigation property name or the path structure.
  Model Changes: If the underlying data model has changed (e.g., properties were renamed or removed), the expand path may no longer be valid.
  Non-Navigation Property: The path may be pointing to a property that is not a navigation property, which means it cannot be expanded.
  
  Solution:
  
  Check the OData Metadata: Review the OData service's metadata (usually accessible via a URL like http://<service-url>/$metadata) to confirm the correct navigation properties and their names.
  Correct the Expand Path: Ensure that the path specified in the $expand option correctly points to a navigation property. The path should end with a navigation property, not a scalar property.
  Use the Correct Syntax: Make sure that the syntax used in the expand path is correct. For example, if you have a navigation property called Orders, the correct usage would be $expand=Orders.
  Test with Simple Queries: Start with a simple query to ensure that the basic functionality is working, and then gradually add complexity to identify where the issue arises.
  Check for Changes in the Model: If the service has been recently updated, verify that the changes are reflected in your requests.
  
  Related Information:
  
  OData Documentation: Familiarize yourself with the OData protocol and its conventions, especially regarding navigation properties and the $expand option.
  SAP Gateway: If you are working with SAP Gateway, refer to the SAP Gateway documentation for specific details on how to define and use navigation properties in your OData services.
  Debugging Tools: Use tools like Postman or SAP Gateway Client to test your OData requests and see the responses, which can help in diagnosing issues.
  
  By following these steps, you should be able to resolve the error and successfully use the $expand functionality in your OData requests.