How To Fix RJ102 - DataSource already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: RJ - BW Extractor Handling Message Class

• Message number: 102

• Message text: DataSource already exists

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RJ102 - DataSource already exists ?

  The SAP error message RJ102, which states "DataSource already exists," typically occurs when you attempt to create a DataSource in SAP BW (Business Warehouse) that has the same name as an existing DataSource. This can happen during the process of data modeling or when trying to replicate DataSources from a source system.
  Cause:
  
  Duplicate DataSource Name: The most common cause is that a DataSource with the same name already exists in the system.
  Replication Issues: If you are replicating DataSources from a source system, the DataSource may already be present in the BW system.
  Transport Issues: If a DataSource was transported from another system, it may have created a duplicate entry.
  
  Solution:
  
  
  Check Existing DataSources: 
  
  Go to the DataSource maintenance transaction (e.g., RSA1 or RSO2) and check if the DataSource you are trying to create already exists.
  If it does exist, you may need to modify the existing DataSource instead of creating a new one.
  
  
  
  Rename the New DataSource: 
  
  If you need to create a new DataSource, consider using a different name that does not conflict with existing DataSources.
  
  
  
  Delete or Archive the Existing DataSource: 
  
  If the existing DataSource is no longer needed, you can delete it (if it is not in use) or archive it to free up the name.
  
  
  
  Check for Transport Requests: 
  
  If the DataSource was transported from another system, ensure that the transport request was completed successfully and that there are no inconsistencies.
  
  
  
  Consult Documentation: 
  
  Review SAP documentation or notes related to DataSource creation and management for any additional guidance.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  RSA1: Data Warehousing Workbench
  RSO2: DataSource Maintenance
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to DataSource management.
  DataSource Types: Understand the different types of DataSources (e.g., generic, SAP, etc.) and their implications on naming conventions.
  Best Practices: Follow best practices for naming conventions and documentation to avoid conflicts in the future.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or BW team for further investigation.