How To Fix /EACC/DMB026 - DataSource &1 has already been created

SAP Error Message - Details

• Message type: E = Error

• Message class: /EACC/DMB -

• Message number: 026

• Message text: DataSource &1 has already been created

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /EACC/DMB026 - DataSource &1 has already been created ?

  The SAP error message /EACC/DMB026 DataSource &1 has already been created typically occurs in the context of SAP Data Warehousing or SAP BW (Business Warehouse) when you attempt to create a DataSource that already exists in the system. This can happen during the process of data extraction or when setting up data flows.
  Cause:
  The error indicates that the DataSource you are trying to create (denoted by &1, which will be replaced by the actual DataSource name) already exists in the system. This can happen due to:
  
  An attempt to create a DataSource with the same name as an existing one.
  A previous configuration or setup that was not properly deleted or modified.
  A duplicate entry in the system due to a copy-paste error or similar.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing DataSources:
  
  Go to the DataSource management area in SAP BW (transaction code RSA1).
  Navigate to the relevant InfoSource or DataSource area and check if the DataSource with the specified name already exists.
  
  
  
  Modify or Delete Existing DataSource:
  
  If the DataSource exists and you need to make changes, you can modify the existing DataSource instead of creating a new one.
  If the DataSource is no longer needed, you can delete it. Be cautious with deletion, as it may affect existing data flows or reports.
  
  
  
  Use a Different Name:
  
  If you need to create a new DataSource and the existing one is required, consider using a different name for the new DataSource to avoid conflicts.
  
  
  
  Check for Transport Issues:
  
  If you are working in a transport environment, ensure that the DataSource was not transported from another system, which could lead to duplicates.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to DataSource creation and management for any specific guidelines or best practices.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench) and RSD1 (InfoObject Maintenance).
  SAP Notes: Check SAP Notes for any known issues or patches related to DataSource management.
  DataSource Naming Conventions: Follow naming conventions to avoid conflicts and ensure clarity in your DataSource management.
  
  By following these steps, you should be able to resolve the error and successfully manage your DataSources in SAP BW.