How To Fix /IWBEP/CM_CP218 - Complex property '&1' not last path segment on V2 select

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 218

• Message text: Complex property '&1' not last path segment on V2 select

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_CP218 - Complex property '&1' not last path segment on V2 select ?

  The SAP error message /IWBEP/CM_CP218 Complex property '&1' not last path segment on V2 select typically occurs in the context of OData services when there is an issue with the way complex properties are being accessed in a V2 OData select statement. This error indicates that the complex property specified is not the last segment in the path of the request.
  Cause:
  
  Complex Property Access: The error arises when a complex property is not being accessed correctly in the OData query. In OData, complex types can contain other properties, and when querying, the last segment of the path should ideally be a primitive property or a collection.
  Incorrect Path: The path specified in the OData request may be incorrectly structured, leading to the complex property being treated as if it should be the last segment, which it cannot be.
  
  Solution:
  
  
  Check the OData Query: Review the OData query being sent to ensure that the complex property is not being used as the last segment. For example, if you have a complex property Address with sub-properties like Street and City, your query should access the sub-properties directly rather than trying to access Address as the last segment.
  
  Correct Example: /EntitySet?$select=Address/Street,Address/City
  Incorrect Example: /EntitySet?$select=Address
  
  
  
  Modify the Service Implementation: If you are developing the OData service, ensure that the service is correctly configured to handle complex types and that the metadata is correctly defined. This includes ensuring that the complex types are properly defined in the service's data model.
  
  
  Review Metadata: Check the service's metadata (usually accessible via the $metadata endpoint) to understand the structure of the entity and its complex types. This will help you construct the correct query.
  
  
  Testing: After making the necessary changes, test the OData query again to ensure that the error is resolved.
  
  
  Related Information:
  
  OData Version: Ensure that you are aware of the OData version you are working with, as there are differences in how complex types are handled between versions.
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional context or updates regarding this error.
  Debugging: If you have access to the backend, consider debugging the OData service to see how the request is being processed and where it might be failing.
  
  By following these steps, you should be able to resolve the error and correctly access the complex properties in your OData service.