How To Fix RSO_CTC251 - &1 RDA daemons could not be rescheduled (see BW transaction RSRDA)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 251

• Message text: &1 RDA daemons could not be rescheduled (see BW transaction RSRDA)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSO_CTC251 - &1 RDA daemons could not be rescheduled (see BW transaction RSRDA) ?

  The SAP error message RSO_CTC251 indicates that the RDA (Real-Time Data Acquisition) daemons could not be rescheduled. This error typically occurs in the context of SAP BW (Business Warehouse) when there are issues with the RDA process, which is responsible for real-time data loading from source systems into the BW system.
  Causes:
  
  Configuration Issues: Incorrect configuration of the RDA settings in the BW system can lead to this error.
  Daemon Status: The RDA daemons may not be running or may have encountered an error that prevents them from being rescheduled.
  System Performance: High system load or performance issues can cause the daemons to fail to reschedule.
  Network Issues: Connectivity problems between the BW system and the source system can also lead to this error.
  Authorization Issues: Insufficient authorizations for the user or the system to access the necessary resources can cause the daemons to fail.
  
  Solutions:
  
  Check Daemon Status: Use transaction RSRDA to check the status of the RDA daemons. Ensure that they are running and not in an error state.
  Review Configuration: Verify the RDA configuration settings in the BW system. Ensure that all necessary parameters are correctly set.
  Restart Daemons: If the daemons are not running, try restarting them. This can often resolve temporary issues.
  Monitor System Performance: Check the system performance and resource utilization. If the system is under heavy load, consider optimizing performance or scheduling data loads during off-peak hours.
  Check Network Connectivity: Ensure that there are no network issues between the BW system and the source system. Test connectivity and resolve any issues found.
  Review Authorizations: Ensure that the user and system have the necessary authorizations to perform RDA operations.
  
  Related Information:
  
  Transaction RSRDA: This transaction is used to monitor and manage RDA processes in SAP BW. It provides insights into the status of daemons and allows for troubleshooting.
  SAP Notes: Check for any relevant SAP Notes that may address known issues related to RDA and the specific error message. SAP Notes can provide patches or additional troubleshooting steps.
  System Logs: Review system logs (transaction SM21) for any related error messages or warnings that could provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with SAP support or your internal SAP Basis team for further assistance.