How To Fix /IWBEP/SBOD144 - Property '&1&2&3' is a key and must not have a complex type

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/SBOD -

• Message number: 144

• Message text: Property '&1&2&3' is a key and must not have a complex type

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/SBOD144 - Property '&1&2&3' is a key and must not have a complex type ?

  The SAP error message /IWBEP/SBOD144 Property '&1&2&3' is a key and must not have a complex type typically occurs in the context of SAP Gateway and OData services. This error indicates that a property defined as a key in your OData model is of a complex type, which is not allowed. In OData, keys must be simple types (like strings, integers, etc.) and cannot be complex types (which can contain multiple properties).
  Cause:
  
  Complex Type as Key: The property defined as a key in your OData service is a complex type. OData specifications require that keys be simple types.
  Model Definition Issues: There may be an issue in the way the data model is defined in the ABAP backend or in the service definition.
  Incorrect Annotations: The annotations in the metadata might incorrectly specify a complex type as a key.
  
  Solution:
  
  Review the Data Model: Check the data model definition in your ABAP backend. Ensure that the properties defined as keys are of simple types.
  Modify the Key Definition: If a complex type is mistakenly set as a key, you need to change it to a simple type. This may involve altering the underlying database structure or the way the OData service is defined.
  Update the Service Definition: If you are using transaction code /IWFND/MAINT_SERVICE, ensure that the service definition reflects the correct key properties.
  Regenerate the OData Service: After making changes to the model, regenerate the OData service to ensure that the changes are reflected in the service metadata.
  Check Annotations: Ensure that the annotations in your service definition do not incorrectly specify complex types as keys.
  
  Related Information:
  
  OData Specification: Familiarize yourself with the OData specifications regarding entity keys and types. Keys must be simple types as per the OData protocol.
  SAP Gateway Documentation: Review the SAP Gateway documentation for best practices on defining OData services and data models.
  Debugging Tools: Use transaction codes like /IWFND/ERROR_LOG to check for additional error messages that might provide more context on the issue.
  Community and Support: If the issue persists, consider reaching out to the SAP Community or SAP Support for further assistance.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service is correctly defined.