How To Fix CNV20551519 - Lock not possible for PerNo &1.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20551 - message for package 20551 (company code delete)

• Message number: 519

• Message text: Lock not possible for PerNo &1.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20551519 - Lock not possible for PerNo &1. ?

  The SAP error message CNV20551519, which states "Lock not possible for PerNo &1," typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system is unable to lock a specific personnel number (PerNo) for processing, which can lead to issues in data consistency and integrity.
  Causes:
  
  Concurrent Access: The personnel number is currently being accessed or modified by another process or user, preventing the lock from being established.
  Database Locking Issues: There may be database-level locks that are preventing the system from acquiring the necessary lock on the personnel number.
  Long-running Transactions: If there are long-running transactions that are holding locks on the personnel number, it can lead to this error.
  Configuration Issues: There may be configuration settings in the system that are affecting how locks are managed.
  
  Solutions:
  
  Check for Active Sessions: Use transaction codes like SM12 (to check for locks) and SM21 (to check system logs) to identify if there are any active sessions or processes that are holding locks on the personnel number.
  Wait and Retry: If the lock is due to a temporary condition (like another user processing the same personnel number), waiting for a short period and then retrying the operation may resolve the issue.
  Terminate Long-running Processes: If you identify any long-running processes that are holding locks, consider terminating them if appropriate and safe to do so.
  Review Configuration: Check the configuration settings related to locking mechanisms in your SAP system to ensure they are set up correctly.
  Consult SAP Notes: Look for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (to view and manage locks), SM21 (to view system logs), and ST22 (to check for dumps).
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the context in which it occurs.
  Documentation: Review the documentation for the specific migration or conversion tool you are using, as it may contain additional troubleshooting steps or known issues related to locking.
  
  By following these steps, you should be able to diagnose and resolve the CNV20551519 error effectively.