How To Fix MC520 - & & currently locked by user &

MC520 - Overview

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 520

• Message text: & & currently locked by user &

What causes this issue?

The specified object is currently being edited by another user. For
reasons of consistency, it is locked until this user has finished
editing the object.

System Response

Editing of this object is cancelled.

How to fix this error?

Try to edit the object again after a few minutes or consult the user
defined in the message.

Error message extract from SAP system. Copyright SAP SE.

MC520 - Details

• The SAP error message MC520 typically indicates that a particular object (such as a material, document, or transaction) is currently locked by a user. This can happen in various SAP modules, particularly in the context of inventory management or material master data.
  
  Cause:
  
  User Lock: The object is being edited or processed by another user, which prevents other users from making changes until the lock is released.
  Session Timeout: Sometimes, a user may have left a session open, causing a lock on the object.
  System Error: Occasionally, a system error or crash can leave an object in a locked state.
  Long-running Transactions: If a transaction takes too long to complete, it may hold locks longer than expected.
  
  
  Solution:
  
  Wait and Retry: If the lock is temporary, waiting for the other user to finish their transaction may resolve the issue.
  Identify the Locking User: Use transaction code SM12 to view and manage locks. You can check which user is