How To Fix NSDM_MIG_CONTROL044 - Aggregate group &1 &2 cannot be locked

SAP Error Message - Details

• Message type: E = Error

• Message class: NSDM_MIG_CONTROL - Log message for migration

• Message number: 044

• Message text: Aggregate group &1 &2 cannot be locked

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message NSDM_MIG_CONTROL044 - Aggregate group &1 &2 cannot be locked ?

  The SAP error message NSDM_MIG_CONTROL044 indicates that an aggregate group cannot be locked, which typically occurs during data migration or when performing operations that require exclusive access to certain database objects. This error can arise due to various reasons, including:
  Causes:
  
  Concurrent Access: Another user or process is currently accessing or modifying the aggregate group, preventing it from being locked.
  Long-Running Transactions: A transaction that is taking a long time to complete may hold a lock on the aggregate group.
  Database Locking Issues: There may be issues with the database locking mechanism, such as deadlocks or lock timeouts.
  Insufficient Authorizations: The user attempting to lock the aggregate group may not have the necessary authorizations to do so.
  
  Solutions:
  
  Check for Active Sessions: Use transaction codes like SM12 (to check for locks) and SM66 (to monitor active processes) to identify if another session is holding a lock on the aggregate group.
  Wait and Retry: If the lock is held by a long-running transaction, you may need to wait for it to complete before retrying the operation.
  Terminate Blocking Sessions: If you identify a session that is blocking the lock and it is safe to do so, you can terminate that session using transaction SM37 (to find the job) or SM12 (to delete the lock).
  Check Authorizations: Ensure that the user has the necessary authorizations to perform the operation. You may need to consult with your SAP security team.
  Database Administration: If the issue persists, it may require intervention from your database administrator to check for any underlying database issues.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Transaction Codes: Familiarize yourself with transaction codes like SM12, SM21, SM37, and SM66 for monitoring locks, system logs, and active processes.
  Documentation: Review SAP documentation related to data migration and aggregate management for best practices and guidelines.
  
  If the problem continues after trying the above solutions, consider reaching out to SAP support for further assistance.