How To Fix /ACCGO/MCK_MAINT455 - &1 table locked by some other object

SAP Error Message - Details

• Message type: E = Error

• Message class: /ACCGO/MCK_MAINT -

• Message number: 455

• Message text: &1 table locked by some other object

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /ACCGO/MCK_MAINT455 - &1 table locked by some other object ?

  The SAP error message /ACCGO/MCK_MAINT455 indicates that a specific table is locked by another object, which prevents the current operation from being completed. This type of error typically occurs in the context of data maintenance or updates, particularly in the area of financial accounting or controlling.
  Cause:
  
  Table Locking: The error usually arises when another transaction or process is currently accessing or modifying the same table. SAP uses locking mechanisms to ensure data integrity, and if a table is locked by one process, other processes trying to access it will encounter this error.
  Long-running Transactions: If a transaction takes too long to complete, it may hold a lock on the table longer than expected, causing subsequent transactions to fail.
  Deadlocks: In some cases, a deadlock situation may occur where two or more processes are waiting for each other to release locks, leading to this error.
  Background Jobs: Sometimes, background jobs or batch processes may be running and holding locks on the table.
  
  Solution:
  
  Identify the Lock: Use transaction code SM12 to check for existing locks on the table. You can filter by user or table name to find the specific lock.
  Release the Lock: If you identify a lock that is no longer needed (e.g., a user session that has been terminated), you can manually delete the lock entry from SM12. However, be cautious when doing this, as it may lead to data inconsistency if the other process is still running.
  Wait and Retry: If the lock is held by a legitimate process, it may be best to wait for that process to complete and then retry your operation.
  Optimize Long-running Transactions: If you frequently encounter this issue, consider reviewing and optimizing long-running transactions to minimize the time they hold locks.
  Check Background Jobs: Use transaction SM37 to check for any background jobs that might be locking the table. If necessary, you can stop or reschedule these jobs.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM37: Monitor background jobs.
  SM21: Check system logs for any related errors or warnings.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for the error message or related keywords in the SAP Support Portal.
  Documentation: Review SAP documentation related to table locking and transaction management for a deeper understanding of how locks work in SAP.
  
  If the problem persists after trying the above solutions, it may be necessary to consult with your SAP Basis team or SAP support for further assistance.