How To Fix DDANNO003 - Header annotations are not permitted in entity extensions

SAP Error Message - Details

• Message type: E = Error

• Message class: DDANNO - CDS annotations

• Message number: 003

• Message text: Header annotations are not permitted in entity extensions

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDANNO003 - Header annotations are not permitted in entity extensions ?

  The SAP error message DDANNO003: Header annotations are not permitted in entity extensions typically occurs in the context of SAP's ABAP programming model, particularly when working with CDS (Core Data Services) views or OData services. This error indicates that there is an issue with the annotations defined in an entity extension.
  Cause:
  The error arises when you attempt to define header annotations (such as @UI.headerInfo) in an entity extension. In SAP, entity extensions are meant to extend the properties of an existing entity, but they do not allow for the addition of header annotations. Header annotations are typically defined at the level of the original entity and not in its extensions.
  Solution:
  To resolve this error, you should follow these steps:
  
  
  Remove Header Annotations from the Extension: Check the entity extension where the error is occurring and remove any header annotations that you have defined there. Ensure that all header-related annotations are only present in the original entity definition.
  
  
  Define Annotations in the Original Entity: If you need to use header annotations, make sure they are defined in the original entity rather than in the extension. This way, the extended entity will inherit the header annotations from the original entity.
  
  
  Check for Other Annotations: While header annotations are not allowed in extensions, other types of annotations (like field annotations) may still be permissible. Review your annotations to ensure they comply with the rules for entity extensions.
  
  
  Test the Changes: After making the necessary adjustments, test the CDS view or OData service to ensure that the error is resolved and that the expected behavior is achieved.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation on CDS views and annotations for detailed guidelines on how to properly use annotations in your models.
  SAP Community: Engage with the SAP Community forums to find discussions related to similar issues, which can provide additional insights and solutions.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues or provide updates related to this error message.
  
  By following these steps, you should be able to resolve the DDANNO003 error and ensure that your entity extensions are correctly defined without header annotations.