How To Fix RSSDK057 - A source system assignment for BW Myself source system already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: RSSDK -

• Message number: 057

• Message text: A source system assignment for BW Myself source system already exists

What causes this issue?

There is already a source system assignment for the selected InfoSource
to the BW Myself source system and to an associated generic extractor.
Assignment of another extractor from the BW Myself source system to this
InfoSource is not supported.

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?

Delete the current assignment of the BW Myself source system to this
InfoSource before generating again.

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 RSSDK057 - A source system assignment for BW Myself source system already exists ?

  The SAP error message RSSDK057 indicates that there is an existing source system assignment for the BW (Business Warehouse) system you are trying to configure. This typically occurs when you attempt to create a new source system assignment for a BW system that has already been defined in the system.
  Cause:
  
  Duplicate Source System Assignment: The error arises because the source system you are trying to assign (in this case, "BW Myself") is already assigned to the BW system in the SAP landscape.
  Configuration Issues: There may be inconsistencies or misconfigurations in the source system settings.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Assignments:
  
  Go to the SAP BW system and check the existing source system assignments.
  Use transaction code RSA1 to access the Data Warehousing Workbench.
  Navigate to the "Source Systems" section and verify if "BW Myself" is already listed.
  
  
  
  Modify or Delete Existing Assignment:
  
  If you find that the source system is already assigned and you need to make changes, you can either modify the existing assignment or delete it if it is no longer needed.
  To delete, select the existing source system and choose the delete option.
  
  
  
  Create New Assignment:
  
  After ensuring that there are no duplicate assignments, you can proceed to create a new source system assignment.
  Use the appropriate transaction code (like RSA1 or RSC1) to create the source system again.
  
  
  
  Check for Transport Requests:
  
  If you are working in a development environment and the changes need to be transported to a production environment, ensure that the transport requests are correctly set up and that the source system assignments are included.
  
  
  
  Consult Documentation:
  
  If the issue persists, consult the SAP documentation or support for further troubleshooting steps specific to your version of SAP BW.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  RSA1: Data Warehousing Workbench
  RSC1: Create Source System
  RSC2: Change Source System
  RSC3: Display Source System
  
  
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  
  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 RSSDK057 error and successfully manage your source system assignments in SAP BW.