How To Fix DDANNO001 - Unknown annotation '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: DDANNO - CDS annotations

• Message number: 001

• Message text: Unknown annotation '&1'

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDANNO001 - Unknown annotation '&1' ?

  The SAP error message DDANNO001 Unknown annotation '&1' typically occurs when the system encounters an annotation in your ABAP code or metadata that it does not recognize. This can happen in various contexts, such as when working with CDS (Core Data Services) views, annotations in OData services, or other areas where annotations are used to enhance the functionality of the data model.
  Cause:
  
  Typographical Error: The annotation name may be misspelled or incorrectly formatted.
  Unsupported Annotation: The annotation being used may not be supported in the version of SAP you are using.
  Missing Dependencies: The required package or component that defines the annotation may not be installed or activated in your system.
  Version Mismatch: The annotation may be valid in a newer version of SAP but not in the version you are currently using.
  
  Solution:
  
  Check Annotation Spelling: Verify that the annotation name is spelled correctly and follows the correct syntax.
  Consult Documentation: Refer to the official SAP documentation to ensure that the annotation you are using is valid and supported in your version of SAP.
  Update System: If the annotation is valid but not recognized, consider updating your SAP system to a version that supports the annotation.
  Check Dependencies: Ensure that all necessary components and packages are installed and activated in your SAP system.
  Remove or Replace: If the annotation is not essential, consider removing it or replacing it with a supported alternative.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific annotation you are using.
  ABAP Development Tools: Use the ABAP Development Tools in Eclipse to get better insights and suggestions regarding annotations.
  Community Forums: Engage with the SAP Community or forums to see if others have encountered the same issue and found solutions.
  SAP Help Portal: Utilize the SAP Help Portal for detailed information on annotations and their usage in your specific context.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.