How To Fix CNVMBT128 - Transaction is already locked by another user

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBT - Messages for MBT/API/PCL

• Message number: 128

• Message text: Transaction is already locked by another user

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 CNVMBT128 - Transaction is already locked by another user ?

  The SAP error message CNVMBT128 indicates that a transaction is currently locked by another user. This typically occurs in scenarios where multiple users are trying to access or modify the same data or transaction simultaneously, leading to a conflict.
  Cause:
  
  Concurrent Access: Another user is currently processing the same transaction or data set.
  Long-Running Transactions: A transaction may be taking longer than expected, causing other users to encounter a lock.
  System Configuration: Certain configurations or settings in the SAP system may lead to more frequent locking issues.
  Background Jobs: Background jobs that are running and accessing the same data can also cause locks.
  
  Solution:
  
  Wait and Retry: If the transaction is locked by another user, the simplest solution is to wait for that user to complete their transaction and then try again.
  Identify the Lock: Use transaction code SM12 to check for locks. You can see which user is holding the lock and what object is locked.
  Release the Lock: If you have the necessary authorizations, you can manually release the lock from transaction SM12. However, this should be done with caution, as it may lead to data inconsistencies.
  Check for Long-Running Transactions: Investigate if there are any long-running transactions that can be optimized or terminated if they are no longer needed.
  Review System Configuration: Consult with your SAP Basis team to review system settings and configurations that may be contributing to locking issues.
  User Communication: If possible, communicate with the user who is holding the lock to understand their needs and coordinate access to the transaction.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related issues.
  ST22: To check for dumps that might provide additional context.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking behavior in your specific version of SAP.
  Performance Monitoring: Regularly monitor system performance and transaction usage to identify patterns that may lead to locking issues.
  
  If the problem persists, it may be beneficial to engage with SAP support for further assistance, especially if it is affecting multiple users or critical business processes.