How To Fix CNV_NCE_BAS029 - No free background processes available

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 029

• Message text: No free background processes available

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_NCE_BAS029 - No free background processes available ?

  The SAP error message CNV_NCE_BAS029: No free background processes available typically occurs when there are no available background processing resources in the SAP system to execute a job. This can happen for various reasons, including system configuration, resource limitations, or high system load.
  Causes:
  
  Limited Background Processes: The number of background processes configured in the SAP system is insufficient for the current workload.
  High System Load: There may be too many background jobs running simultaneously, consuming all available background processing resources.
  Configuration Issues: The system may not be configured correctly to allow for the desired number of background processes.
  Job Scheduling Conflicts: There may be conflicts or dependencies between scheduled jobs that prevent new jobs from starting.
  
  Solutions:
  
  
  Increase Background Processes:
  
  Go to transaction RZ10 to adjust the profile parameters.
  Look for the parameter rdisp/wp_no_btc which controls the number of background work processes.
  Increase the value to allow more background processes. After making changes, you will need to restart the SAP instance for the changes to take effect.
  
  
  
  Monitor Background Jobs:
  
  Use transaction SM37 to monitor the status of background jobs.
  Check for jobs that are running for an extended period or are stuck, and consider terminating them if they are no longer needed.
  
  
  
  Optimize Job Scheduling:
  
  Review the scheduling of background jobs to ensure they are not all set to run at the same time.
  Stagger job schedules to reduce peak load on background processes.
  
  
  
  Check System Performance:
  
  Use transaction ST03N to analyze system performance and identify any bottlenecks.
  Ensure that the system has adequate resources (CPU, memory) to handle the workload.
  
  
  
  Review System Logs:
  
  Check the system logs (transaction SM21) for any errors or warnings that might indicate underlying issues affecting background processing.
  
  
  
  Consult Basis Team:
  
  If you are not able to resolve the issue, consult your SAP Basis team for further analysis and assistance.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  RZ10: Profile parameter maintenance.
  SM37: Job monitoring.
  ST03N: Workload analysis.
  SM21: System log.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to background processing issues.
  
  
  By following these steps, you should be able to diagnose and resolve the CNV_NCE_BAS029 error in your SAP system.