How To Fix R8457 - Hierarchy additional information of DataSource & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: R8 - Messages from the meta data generation

• Message number: 457

• Message text: Hierarchy additional information of DataSource & already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message R8457 - Hierarchy additional information of DataSource & already exists ?

  The SAP error message R8457, which states "Hierarchy additional information of DataSource & already exists," typically occurs in the context of SAP BW (Business Warehouse) or SAP BW/4HANA when you are trying to create or modify a hierarchy for a DataSource that already has an existing hierarchy defined.
  Cause:
  
  Duplicate Hierarchy: The error indicates that you are attempting to create a hierarchy for a DataSource that already has a hierarchy defined. This can happen if you are trying to import or activate a DataSource that has already been set up with a hierarchy.
  DataSource Configuration: The DataSource might have been previously configured with a hierarchy, and the system is preventing the creation of a new one to avoid conflicts or data integrity issues.
  
  Solution:
  
  
  Check Existing Hierarchies: 
  
  Go to the DataSource in question and check if there is already a hierarchy defined. You can do this in the SAP BW modeling tools or transaction codes like RSA1 (Data Warehousing Workbench).
  
  
  
  Delete or Modify Existing Hierarchy:
  
  If you find that a hierarchy already exists and you need to create a new one, you may need to delete the existing hierarchy first. Be cautious with this step, as it may affect reports or queries that rely on the existing hierarchy.
  Alternatively, you can modify the existing hierarchy if it does not meet your current requirements.
  
  
  
  Re-import DataSource:
  
  If you have made changes to the DataSource or its hierarchy, you may need to re-import the DataSource to ensure that the changes are reflected in the system.
  
  
  
  Consult Documentation: 
  
  Review SAP documentation or notes related to the specific DataSource and hierarchy management to ensure you are following best practices.
  
  
  
  Check for Transport Issues: 
  
  If this error occurs after a transport, ensure that the transport did not inadvertently create conflicts with existing hierarchies.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), RSO2 (DataSource Maintenance), and RSO3 (DataSource Hierarchy).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for notes in the SAP Support Portal.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the R8457 error and manage your DataSource hierarchies effectively.