How To Fix R8405 - The DataSource & already exists

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 405

• Message text: The DataSource & already exists

What causes this issue?

You tried to create a DataSource that exists already. You are only able
to display or change existing DataSources.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message R8405 - The DataSource & already exists ?

  The SAP error message R8405, which states "The DataSource & already exists," typically occurs when you are trying to create a DataSource in SAP that already exists in the system. This can happen in various contexts, such as when working with SAP BW (Business Warehouse) or SAP Data Services.
  Cause:
  
  Duplicate DataSource: The most common cause of this error is that a DataSource with the same name or identifier already exists in the system.
  Transport Issues: If you are transporting objects from one system to another, the DataSource may already be present in the target system.
  Incorrect Naming: Sometimes, the naming conventions may lead to confusion, where a similar name might already be in use.
  
  Solution:
  
  
  Check Existing DataSources: 
  
  Use transaction code RSA1 (for BW) or the relevant transaction for your context to check if the DataSource already exists.
  Search for the DataSource by its name or identifier to confirm its existence.
  
  
  
  Modify or Delete Existing DataSource:
  
  If the DataSource exists and you need to create a new one, consider modifying the existing DataSource if it meets your requirements.
  If the existing DataSource is no longer needed, you can delete it (ensure you have the necessary authorizations and that it is safe to delete).
  
  
  
  Use a Different Name: 
  
  If you need to create a new DataSource, consider using a different name or identifier that does not conflict with existing ones.
  
  
  
  Check Transport Requests: 
  
  If the error is related to transport, ensure that the DataSource is not already included in the transport request you are trying to import.
  
  
  
  Consult Documentation: 
  
  Review SAP documentation or notes related to DataSource creation for any specific guidelines or restrictions.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), RSD1 (InfoObject Maintenance), and RSMO (Monitor Data Transfer).
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to DataSource management.
  Authorization: Ensure you have the necessary authorizations to create, modify, or delete DataSources in your SAP environment.
  
  If the issue persists after following these steps, consider reaching out to your SAP Basis or BW team for further assistance, as they may have additional tools or insights to resolve the issue.