How To Fix /PLMB/BA_ACE002 - Assignment of user &2 to user entity &3 (type &4) is locked by user &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMB/BA_ACE -

• Message number: 002

• Message text: Assignment of user &2 to user entity &3 (type &4) is locked by user &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PLMB/BA_ACE002 - Assignment of user &2 to user entity &3 (type &4) is locked by user &1 ?

  The SAP error message /PLMB/BA_ACE002 indicates that there is an issue with the assignment of a user to a user entity, which is currently locked by another user. This typically occurs in the context of user management or authorization assignments within the SAP system.
  Cause:
  
  User Locking: The user entity (e.g., role, authorization object) that you are trying to assign the user to is currently locked by another user. This can happen if another user is editing the same entity or if a previous session did not release the lock properly.
  Concurrent Access: Multiple users trying to access or modify the same user entity simultaneously can lead to this locking issue.
  System Configuration: Certain configurations in the SAP system may lead to locking mechanisms that prevent changes until the lock is released.
  
  Solution:
  
  Wait and Retry: If the lock is temporary, waiting for a few moments and then retrying the operation may resolve the issue.
  Identify the Locking User: Check who is currently locking the user entity. You can do this by using transaction codes like SM12 (to view and manage locks) or SM21 (to check system logs).
  Release the Lock: If you have the necessary authorizations, you can manually release the lock by deleting the lock entry in SM12. However, be cautious with this approach, as it may disrupt the work of the user who currently holds the lock.
  Communicate with the Locking User: If possible, contact the user who is locking the entity and ask them to complete their task or release the lock.
  Check for Background Jobs: Sometimes, background jobs may hold locks. Check if any background processes are running that might be causing the lock.
  System Restart: In rare cases, a system restart may be necessary to clear persistent locks, but this should be done with caution and typically as a last resort.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SU01 (User Maintenance), PFCG (Role Maintenance), and SM12 (Lock Entries) for user and role management.
  Authorization Issues: Ensure that you have the necessary authorizations to make changes to user assignments.
  SAP Notes: Check SAP Notes for any known issues or patches related to user locking mechanisms in your specific version of SAP.
  Documentation: Review SAP documentation for best practices in user and role management to avoid locking issues in the future.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.