How To Fix CNV_00001528 - Data locked by another user.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_00001 - Message class for CWB settings maintenance programs

• Message number: 528

• Message text: Data locked by another user.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_00001528 - Data locked by another user. ?

  The SAP error message CNV_00001528 indicates that a particular data record is locked by another user, preventing the current user from accessing or modifying that data. This is a common issue in SAP systems, especially in environments where multiple users are working on the same data or during data migration processes.
  Cause:
  
  Concurrent Access: Another user or process is currently accessing or modifying the same data record.
  Long-running Transactions: A transaction that takes a long time to complete may hold locks on data longer than expected.
  Background Jobs: Background jobs or batch processes may be locking the data.
  Uncommitted Transactions: If a transaction is not committed or rolled back, it may leave the data in a locked state.
  
  Solution:
  
  
  Identify the Lock:
  
  Use transaction code SM12 to view and manage locks. You can check which user or process is holding the lock on the specific data.
  Look for the relevant lock entries and identify the user or transaction that is causing the lock.
  
  
  
  Wait and Retry:
  
  If the lock is temporary, you may simply wait for the other user or process to complete their transaction and then retry your action.
  
  
  
  Release the Lock:
  
  If you have the necessary authorizations, you can manually delete the lock entry in SM12. However, this should be done with caution, as it may disrupt the other user's work.
  
  
  
  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.
  
  
  
  Communicate with Users:
  
  If you identify the user or process holding the lock, communicate with them to understand if they can release the lock or if they are still working on the data.
  
  
  
  Review Background Jobs:
  
  Check if any background jobs are running that might be locking the data. You can use transaction SM37 to monitor background jobs.
  
  
  
  Related Information:
  
  Lock Management: Understanding how SAP handles locks can help in troubleshooting. SAP uses a locking mechanism to ensure data integrity during concurrent access.
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM37: Monitor background jobs.
  SM21: Check system logs for any related issues.
  
  
  Performance Tuning: If locks are a frequent issue, consider reviewing the performance of transactions and optimizing them to reduce lock duration.
  
  If the problem persists after trying the above solutions, it may be necessary to consult with your SAP Basis team or technical support for further investigation.