How To Fix CNV668 - Scheduling of jobs for re-creating the index failed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 668

• Message text: Scheduling of jobs for re-creating the index failed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV668 - Scheduling of jobs for re-creating the index failed ?

  The SAP error message CNV668 indicates that there was a failure in scheduling jobs for re-creating the index during a data migration or conversion process, typically associated with the SAP S/4HANA migration or other data conversion projects. This error can arise due to various reasons, and addressing it involves several steps.
  Causes:
  
  Job Scheduling Issues: The job scheduler may not be able to schedule the job due to system load, resource constraints, or configuration issues.
  Authorization Problems: The user executing the job may not have the necessary authorizations to schedule or execute background jobs.
  System Configuration: There may be issues with the configuration of the background processing system or the job scheduling parameters.
  Database Locking: The database might be locked or busy with other operations, preventing the index re-creation job from being scheduled.
  Technical Errors: There could be underlying technical issues, such as missing transport requests, incorrect settings in the job definition, or issues with the database itself.
  
  Solutions:
  
  Check Job Logs: Review the job logs for any specific error messages that can provide more context about the failure.
  Verify Authorizations: Ensure that the user has the necessary authorizations to schedule and execute background jobs. This can be checked in transaction SU53 or SU01.
  Monitor System Load: Check the system load and performance metrics to ensure that the system is not overloaded. If it is, consider scheduling the job during off-peak hours.
  Review Job Scheduling Settings: Go to transaction SM37 to check the status of the job and see if there are any issues with the job scheduling settings.
  Database Health Check: Perform a health check on the database to ensure that it is functioning correctly and not experiencing locking issues.
  Re-run the Job: If the issue was transient, try re-running the job after addressing any identified issues.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error or provide patches or updates that could resolve the issue.
  
  Related Information:
  
  Transaction Codes: 
  
  SM37: To monitor background jobs.
  SM21: To check system logs for errors.
  SU53: To analyze authorization issues.
  
  
  SAP Notes: Search the SAP Support Portal for notes related to CNV668 or job scheduling issues.
  Documentation: Review the SAP documentation related to the specific migration or conversion process you are undertaking, as it may provide additional insights or prerequisites.
  
  If the problem persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.