How To Fix KM120 - Master data table is currently blocked by user &

SAP Error Message - Details

• Message type: E = Error

• Message class: KM - Error messages for Profit Center Accounting

• Message number: 120

• Message text: Master data table is currently blocked by user &

What causes this issue?

The EC-PCA master data tables (Tables CEPC and CEPCT) are currently
locked by another user.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Try the function again later.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KM120 - Master data table is currently blocked by user & ?

  The SAP error message "KM120 Master data table is currently blocked by user" typically indicates that a specific master data table is locked by another user or process, preventing you from making changes or accessing that data. This can occur in various SAP modules, particularly in the context of master data management.
  Causes:
  
  Concurrent Access: Another user or session is currently accessing or modifying the master data table, leading to a lock.
  Long-running Transactions: A transaction that takes a long time to complete may hold a lock on the master data table.
  System Errors: Sometimes, system errors or crashes can leave locks in place that need to be cleared.
  Background Jobs: A background job may be running that is accessing the same data, causing a lock.
  
  Solutions:
  
  Wait and Retry: If the lock is temporary, waiting for a few moments and then retrying the operation may resolve the issue.
  Identify the Lock:
  
  Use transaction code SM12 to view and manage locks. You can check which user or process is holding the lock.
  If you have the necessary authorizations, you can delete the lock entry if it is safe to do so.
  
  
  Check Active Sessions: Use transaction code SM66 to monitor active sessions and identify if another user is working on the same data.
  Communicate with Users: If you identify the user or process holding the lock, communicate with them to understand if they can release the lock.
  Review Background Jobs: Check if any background jobs are running that might be causing the lock. You can use transaction code SM37 to monitor background jobs.
  System Restart: In extreme cases, if the lock cannot be resolved, a system restart may be necessary, but this should be done with caution and typically as a last resort.
  
  Related Information:
  
  Lock Management: Understanding how SAP handles locks can help in troubleshooting. SAP uses a locking mechanism to prevent data inconsistencies during concurrent access.
  User Authorizations: Ensure that you have the necessary authorizations to view and manage locks.
  Performance Monitoring: Regularly monitor system performance and user activities to prevent locking issues from becoming a recurring problem.
  Documentation: Refer to SAP documentation or support notes for specific guidance related to your version of SAP and the modules you are using.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.