How To Fix SDDIC_ADT_DDLX026 - 'keyElementRef' type for annotation '&1' is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDIC_ADT_DDLX - Messages for CDS Metadata Extension

• Message number: 026

• Message text: 'keyElementRef' type for annotation '&1' is not supported

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDIC_ADT_DDLX026 - 'keyElementRef' type for annotation '&1' is not supported ?

  The SAP error message SDDIC_ADT_DDLX026 with the description 'keyElementRef' type for annotation '&1' is not supported typically occurs in the context of using the ABAP Development Tools (ADT) or when working with annotations in the context of CDS (Core Data Services) views or other data modeling scenarios.
  Cause:
  This error generally indicates that there is an issue with the way annotations are defined in your CDS view or data model. Specifically, it suggests that the type of the keyElementRef annotation being used is not supported or recognized by the system. This can happen due to:
  
  Incorrect Annotation Usage: The annotation might be incorrectly defined or used in a context where it is not applicable.
  Version Compatibility: The version of the SAP system or the tools you are using may not support the specific annotation or its usage.
  Syntax Errors: There may be syntax errors in the CDS view or the way the annotations are structured.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Annotation Syntax: Review the syntax of the annotations in your CDS view. Ensure that they are correctly defined according to the SAP documentation.
  
  
  Review Documentation: Consult the official SAP documentation for the specific annotation you are using. Make sure that it is supported in your version of SAP and that you are using it in the correct context.
  
  
  Update SAP System: If you are using an older version of SAP, consider updating to a newer version that supports the annotations you are trying to use.
  
  
  Simplify Annotations: If possible, try to simplify the annotations or remove the problematic ones to see if the error persists. This can help isolate the issue.
  
  
  Check for Known Issues: Look for any known issues or notes in the SAP Support Portal that might relate to this error message. There may be patches or updates available that address the problem.
  
  
  Consult Community or Support: If you are unable to resolve the issue, consider reaching out to the SAP community forums or SAP support for assistance. Provide them with the relevant code snippets and context to help diagnose the issue.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific fixes or recommendations related to this error.
  ABAP Development Tools (ADT): Ensure you are using the latest version of ADT, as updates may include bug fixes and enhancements.
  CDS Annotations: Familiarize yourself with the various CDS annotations and their intended use cases by reviewing the SAP Help Portal.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.