How To Fix RSO_CTC126 - Source system &1 is still connected to BW system &2

SAP Error Message - Details

• Message type: E = Error

• Message class: RSO_CTC - Message class for CTC related messages

• Message number: 126

• Message text: Source system &1 is still connected to BW system &2

What causes this issue?

The source system &V1& is still connected to the BW system &V2&.

System Response

The re-connection of the source system &V1& to the BW will be omitted.

How to fix this error?

If you are unsure, whether the existing connection is ok, you may call
function module RSAR_BIW_DISCONNECT in the BW system in single test and
pass '&V1&' as a parameter. This will disconnect the source system from
the BW.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSO_CTC126 - Source system &1 is still connected to BW system &2 ?

  The SAP error message RSO_CTC126 indicates that a source system (e.g., an SAP ERP system) is still connected to a BW (Business Warehouse) system, which can prevent certain operations from being performed, such as deleting or modifying the connection.
  Cause:
  This error typically occurs when:
  
  There are active connections or sessions between the source system and the BW system.
  The source system is still being used for data extraction or reporting.
  There may be background jobs or processes that are still utilizing the connection.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Active Connections:
  
  Use transaction code SM04 in the BW system to check for active user sessions. Look for any sessions that are connected to the source system.
  Use transaction code SM37 to check for any background jobs that might be running and using the connection.
  
  
  
  Terminate Sessions:
  
  If you find any active sessions or jobs that are using the connection, you may need to terminate them. Ensure that you have the necessary authorizations to do this.
  
  
  
  Check Data Transfer Processes (DTPs):
  
  Review any Data Transfer Processes that might be running or scheduled. If a DTP is currently executing, it may be holding the connection.
  
  
  
  Disconnect the Source System:
  
  If you are sure that no processes are using the connection, you can try to disconnect the source system from the BW system. This can be done in the BW system using transaction RSA1 (Data Warehousing Workbench) and navigating to the source system settings.
  
  
  
  Recheck the Connection:
  
  After ensuring that all sessions and jobs are terminated, try to perform the operation again that was previously blocked by the error.
  
  
  
  Consult Logs:
  
  If the issue persists, check the system logs (transaction SLG1) for any additional error messages or warnings that might provide more context about the connection issue.
  
  
  
  Related Information:
  
  Documentation: Refer to SAP Help documentation for more details on managing source systems and connections in BW.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance, providing them with the error message and any relevant logs.
  
  By following these steps, you should be able to identify and resolve the issue causing the RSO_CTC126 error message.