How To Fix NSDM_MIG_CONTROL021 - MKPF group &1 cannot be locked

SAP Error Message - Details

• Message type: E = Error

• Message class: NSDM_MIG_CONTROL - Log message for migration

• Message number: 021

• Message text: MKPF group &1 cannot be locked

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message NSDM_MIG_CONTROL021 - MKPF group &1 cannot be locked ?

  The SAP error message NSDM_MIG_CONTROL021 indicates that the system is unable to lock the MKPF (Document Header for Material Documents) group specified by the placeholder &1. This typically occurs during data migration or when trying to perform operations that require exclusive access to the MKPF table.
  Causes:
  
  Concurrent Access: Another user or process is currently accessing or modifying the MKPF table, preventing the lock from being acquired.
  Long-running Transactions: A transaction that is taking a long time to complete may hold the lock longer than expected.
  System Configuration: There may be issues with the configuration of the locking mechanism in the SAP system.
  Database Locks: Database-level locks may be preventing access to the MKPF table.
  
  Solutions:
  
  Check for Active Sessions: Use transaction code SM12 to check for any active locks on the MKPF table. If you find any locks that are no longer needed, you can delete them (if you have the necessary authorizations).
  Identify Long-running Transactions: Use transaction code SM66 or SM50 to identify any long-running processes that may be holding the lock. If necessary, you can terminate these processes.
  Retry the Operation: Sometimes, simply retrying the operation after a short wait can resolve the issue if it was caused by a temporary lock.
  Review Batch Jobs: If the error occurs during a batch job, review the job logs to identify any issues that may be causing the lock.
  System Configuration Review: If the problem persists, it may be necessary to review the system configuration related to locking mechanisms. This may require assistance from your SAP Basis team.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  Related Information:
  
  MKPF Table: This table contains the header information for material documents in SAP. It is crucial for inventory management and financial accounting.
  Locking Mechanism: SAP uses a locking mechanism to ensure data integrity during concurrent access. Understanding how this works can help in troubleshooting locking issues.
  Transaction Codes:
  
  SM12: Display and manage locks.
  SM50: Monitor active processes.
  SM66: Monitor global processes.
  SE11: Data dictionary to view table structure.
  
  
  
  If the issue continues after trying the above solutions, it may be beneficial to engage SAP support for further assistance.