How To Fix RSDME857 - Existing BW DataSource &1 is attached to Model &2

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDME -

• Message number: 857

• Message text: Existing BW DataSource &1 is attached to Model &2

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 RSDME857 - Existing BW DataSource &1 is attached to Model &2 ?

  The SAP error message RSDME857 indicates that there is an issue with a DataSource in SAP BW (Business Warehouse) that is currently attached to a model. This error typically arises when you are trying to perform an operation that requires detaching or modifying the DataSource, but it cannot be done because it is still linked to a model.
  Cause:
  The error occurs when:
  
  You attempt to delete or modify a DataSource that is currently being used in a model (e.g., a CompositeProvider or a Calculation View).
  The DataSource is still active or in use, preventing changes.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify the Model: Determine which model the DataSource is attached to. The error message provides the model name (&2).
  
  
  Check Model Usage: 
  
  Go to the model in the SAP BW system and check if the DataSource is being used in any queries, reports, or other models.
  If it is being used, you will need to either remove it from the model or modify the model to no longer depend on that DataSource.
  
  
  
  Detach the DataSource:
  
  If you have confirmed that the DataSource can be detached, go to the model and remove the DataSource from it.
  Save the changes to the model.
  
  
  
  Re-attempt the Operation: After detaching the DataSource from the model, you should be able to perform the operation that was previously blocked (e.g., deleting or modifying the DataSource).
  
  
  Check for Dependencies: Ensure that there are no other dependencies or references to the DataSource in other objects within the BW system.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like RSA1 (Data Warehousing Workbench) to manage DataSources and models.
  Documentation: Refer to SAP Help documentation for more details on managing DataSources and models in BW.
  Version Considerations: The steps may vary slightly depending on the version of SAP BW you are using (e.g., BW 7.4, BW/4HANA).
  
  If you continue to face issues, consider reaching out to your SAP Basis or BW support team for further assistance.