How To Fix CNV_OM_PRESEL151 - Runtime settings can only be adjusted if scheduler is running

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_OM_PRESEL - Messages for LT Object Based Preselection

• Message number: 151

• Message text: Runtime settings can only be adjusted if scheduler is running

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_OM_PRESEL151 - Runtime settings can only be adjusted if scheduler is running ?

  The SAP error message CNV_OM_PRESEL151 indicates that runtime settings for a specific operation cannot be adjusted because the scheduler is not currently running. This error typically occurs in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
  Cause:
  The primary cause of this error is that the scheduler, which is responsible for managing background jobs and processes, is not active. This can happen for several reasons:
  
  The scheduler service is not started.
  The system is in a state where background processing is disabled.
  There may be issues with the configuration of the scheduler.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Scheduler Status:
  
  Ensure that the scheduler is running. You can check this in the SAP system by navigating to transaction SM37 (Job Monitoring) or SM50 (Process Overview) to see if there are any active background jobs.
  
  
  
  Start the Scheduler:
  
  If the scheduler is not running, you may need to start it. This can typically be done through the SAP system administration tools or by restarting the SAP instance.
  
  
  
  Check Configuration:
  
  Verify the configuration settings for the scheduler. Ensure that it is properly set up to allow for background processing.
  
  
  
  System Logs:
  
  Check the system logs (transaction SM21) for any errors or warnings that might indicate why the scheduler is not running.
  
  
  
  Restart the SAP System:
  
  If the above steps do not resolve the issue, consider restarting the entire SAP system, as this can sometimes clear up issues with background processing.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation or notes related to the specific migration or conversion process you are working on for any additional troubleshooting steps.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM37 (Job Monitoring), SM50 (Process Overview), and SM21 (System Log) for monitoring and troubleshooting.
  SAP Notes: Look for SAP Notes related to the specific migration tool or process you are using, as they may provide additional insights or patches that could resolve the issue.
  Background Processing: Understanding how background processing works in SAP can help in diagnosing issues related to the scheduler.
  
  By following these steps, you should be able to address the CNV_OM_PRESEL151 error and adjust the runtime settings as needed.