How To Fix KZ551 - Data locked by user & (table &)

SAP Error Message - Details

• Message type: E = Error

• Message class: KZ - Cost Object Repetitive Mfg / Process Mfg

• Message number: 551

• Message text: Data locked by user & (table &)

What causes this issue?

For consistency all the data to be transported has to be locked.
Locking is not possible in this case, because user &v1& is locking
Table &V2&.

System Response

The system can only carry out the function you selected if all the
data needed can be locked.

How to fix this error?

Wait until user &V1& has finished working in the table, or ask that
user to leave it.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KZ551 - Data locked by user & (table &) ?

  The SAP error message KZ551 indicates that a particular data record is locked by a user, which prevents other users from accessing or modifying that data. This locking mechanism is a part of SAP's concurrency control to ensure data integrity and prevent conflicts when multiple users are trying to access the same data simultaneously.
  Cause:
  The error occurs when:
  
  A user is currently editing or processing a record in a specific table, and that record is locked for editing.
  The lock may be due to a transaction that has not been completed or has been left open.
  The user may have exited the transaction without properly releasing the lock.
  The lock could also be due to a background job or another process that is currently using the data.
  
  Solution:
  To resolve the KZ551 error, you can take the following steps:
  
  
  Identify the Lock:
  
  Use transaction code SM12 to view the lock entries. You can filter by the user ID or the table name to find the specific lock.
  Check the details of the lock to see which user is holding it and what transaction is causing the lock.
  
  
  
  Release the Lock:
  
  If the lock is held by a user who is no longer working on the transaction, you can manually delete the lock entry from SM12. However, this should be done with caution and preferably after confirming with the user or the relevant team to avoid data inconsistency.
  If the lock is due to a background job, you may need to wait for the job to complete or check the job status in transaction SM37.
  
  
  
  Communicate with Users:
  
  If the lock is held by another user, communicate with them to understand if they can complete or cancel their transaction to release the lock.
  
  
  
  Check for Long-Running Transactions:
  
  Investigate if there are any long-running transactions that may be causing locks. If necessary, optimize those transactions to reduce the time they hold locks.
  
  
  
  Review Custom Code:
  
  If the locking issue is frequent, review any custom code or enhancements that may be causing locks to persist longer than necessary.
  
  
  
  Related Information:
  
  Lock Management: SAP uses a locking mechanism to prevent data inconsistencies. Locks can be either exclusive (write locks) or shared (read locks).
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM37: To monitor background jobs that may be holding locks.
  SE11: To view the structure of the table that is locked.
  
  
  User Training: Ensure that users are trained on how to properly complete transactions to avoid leaving locks in place.
  
  By following these steps, you should be able to resolve the KZ551 error and understand the underlying causes of data locking in SAP.