How To Fix RSDD451 - Definitions of aggregate &1 and aggregate &2 are identical

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD - Message class for data manager

• Message number: 451

• Message text: Definitions of aggregate &1 and aggregate &2 are identical

Self-Explanatory Message

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• What is the cause and solution for SAP error message RSDD451 - Definitions of aggregate &1 and aggregate &2 are identical ?

  The SAP error message RSDD451, which states "Definitions of aggregate &1 and aggregate &2 are identical," typically occurs in the context of SAP BW (Business Warehouse) when you are working with aggregates in your InfoCubes. This error indicates that there are two aggregates that have been defined with the same characteristics, which can lead to confusion and inefficiencies in data processing.
  Cause:
  The primary cause of this error is the existence of two aggregates that have identical definitions. This can happen due to:
  
  Duplicate creation of aggregates by mistake.
  Incorrect configuration or copying of existing aggregates.
  Changes in the underlying InfoCube that were not properly reflected in the aggregate definitions.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify the Aggregates: Check the details of the aggregates mentioned in the error message (aggregate &1 and aggregate &2). You can do this by navigating to the aggregate maintenance screen in the SAP BW system.
  
  
  Compare Definitions: Review the definitions of both aggregates to confirm that they are indeed identical. Look for similarities in the key figures, characteristics, and any other settings.
  
  
  Delete or Rename: 
  
  If you confirm that one of the aggregates is redundant, you can delete it. Make sure to check if it is being used in any queries or reports before deletion.
  Alternatively, if both aggregates are needed for different purposes, consider renaming one of them to avoid confusion.
  
  
  
  Rebuild Aggregates: If necessary, you can also rebuild the aggregates to ensure that they are correctly defined and optimized for performance.
  
  
  Transport Requests: If the aggregates were created in a development environment and transported to a production environment, ensure that the transport requests do not contain duplicate definitions.
  
  
  Check for Dependencies: Ensure that there are no dependencies or references to the aggregates that could be affected by deletion or renaming.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or solutions related to this error.
  Documentation: Review SAP BW documentation for best practices on aggregate management and performance optimization.
  Performance Considerations: Having duplicate aggregates can lead to performance issues, so it’s essential to manage them effectively.
  
  By following these steps, you should be able to resolve the RSDD451 error and ensure that your aggregates are correctly defined and optimized for use in your SAP BW environment.