How To Fix MQ812 - Objects could not be locked; transaction is terminated

SAP Error Message - Details

• Message type: E = Error

• Message class: MQ - Messages for Euro Changeover Package

• Message number: 812

• Message text: Objects could not be locked; transaction is terminated

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MQ812 - Objects could not be locked; transaction is terminated ?

  The SAP error message MQ812 indicates that certain objects could not be locked during a transaction, leading to the termination of that transaction. This error typically arises in scenarios where multiple users or processes are trying to access or modify the same object simultaneously, resulting in a conflict.
  Causes:
  
  Concurrent Access: Multiple users or processes are trying to access the same object (e.g., a database record) at the same time.
  Long-running Transactions: A transaction that takes too long to complete may hold locks longer than expected, preventing other transactions from acquiring the necessary locks.
  Deadlocks: Situations where two or more transactions are waiting for each other to release locks, causing a deadlock.
  Lock Table Overflow: The lock table may be full, preventing new locks from being acquired.
  Authorization Issues: The user may not have the necessary authorizations to lock the object.
  
  Solutions:
  
  Retry the Transaction: Often, simply retrying the transaction after a short wait can resolve the issue, especially if it was caused by temporary contention.
  Check for Long-running Transactions: Use transaction codes like SM12 (for lock entries) and SM21 (for system logs) to identify long-running transactions and resolve them.
  Analyze Lock Entries: Use transaction SM12 to view and delete unnecessary lock entries that may be causing contention.
  Increase Lock Table Size: If the lock table is full, consider increasing its size in the system configuration.
  Review Authorizations: Ensure that the user has the necessary authorizations to lock the objects they are trying to access.
  Implement Proper Locking Mechanisms: If you are developing custom programs, ensure that you are using proper locking mechanisms to avoid conflicts.
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: View system logs for error messages and warnings.
  ST22: Check for dumps that may provide additional context.
  SM37: Monitor background jobs that may be causing locks.
  
  
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to locking issues. You can search for relevant notes in the SAP Support Portal.
  
  
  Performance Tuning: Regularly monitor and tune the performance of your SAP system to minimize the chances of lock contention.
  
  
  By following these steps, you should be able to diagnose and resolve the MQ812 error effectively. If the problem persists, consider reaching out to SAP support for further assistance.