How To Fix SD_CDS_PROJECTION021 - Redefined Associations are not supported yet.

SAP Error Message - Details

• Message type: E = Error

• Message class: SD_CDS_PROJECTION - Message for Projection Entities

• Message number: 021

• Message text: Redefined Associations are not supported yet.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SD_CDS_PROJECTION021 - Redefined Associations are not supported yet. ?

  The SAP error message SD_CDS_PROJECTION021 with the description "Redefined Associations are not supported yet" typically occurs in the context of Core Data Services (CDS) views in SAP, particularly when working with the SAP S/4HANA system. This error indicates that there is an issue with the way associations are defined in the CDS view.
  Cause:
  The error arises when you attempt to redefine an association in a CDS view. In SAP CDS, associations are used to define relationships between different entities (tables or views). However, certain types of redefinitions or modifications to existing associations are not supported, leading to this error.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the CDS View Definition: Check the definition of the CDS view where the error occurs. Look for any associations that may be redefined or incorrectly specified.
  
  
  Avoid Redefining Associations: If you are trying to redefine an existing association, consider using the original association instead. You may need to create a new CDS view or modify your existing view to avoid redefining associations.
  
  
  Use Annotations: If you need to change the behavior of an association, consider using annotations instead of redefining the association itself.
  
  
  Check for Compatibility: Ensure that the associations you are using are compatible with the underlying data model and that they adhere to the rules of CDS view definitions.
  
  
  Consult Documentation: Refer to the official SAP documentation for Core Data Services to understand the limitations and best practices regarding associations.
  
  
  Debugging: If the issue persists, you may want to debug the CDS view to identify the exact point of failure and gather more context about the error.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  CDS View Best Practices: Familiarize yourself with best practices for creating and managing CDS views, especially regarding associations and projections.
  
  By following these steps, you should be able to resolve the error and successfully work with your CDS views in SAP.