How To Fix UJCTRL_EXCEPTION028 - Control &1 is locked by user &2

SAP Error Message - Details

• Message type: E = Error

• Message class: UJCTRL_EXCEPTION - BPC: control exception message class

• Message number: 028

• Message text: Control &1 is locked by user &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UJCTRL_EXCEPTION028 - Control &1 is locked by user &2 ?

  The SAP error message UJCTRL_EXCEPTION028 indicates that a control (in this case, a specific control object) is locked by a user. This typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when a user is trying to access or modify a control that is currently locked by another user.
  Cause:
  
  User Locking: The control is being accessed or modified by another user, which causes it to be locked. This can happen during data loading, reporting, or when a user is performing administrative tasks.
  Long-Running Transactions: If a user has initiated a long-running transaction that has not yet completed, it may hold a lock on the control.
  System Errors: Sometimes, system errors or crashes can leave controls in a locked state.
  
  Solution:
  
  Identify the Locking User: Check the user who is locking the control. You can do this by using transaction codes like SM12 (to view lock entries) or SM21 (to check system logs).
  Contact the User: If possible, contact the user who is holding the lock and ask them to complete their transaction or release the lock.
  Release the Lock: If the locking user is not available or the lock is stale (e.g., due to a crash), you may need to manually release the lock. This can be done in transaction SM12 by selecting the relevant lock entry and deleting it.
  Check for Long-Running Processes: Use transaction SM66 to monitor active processes and identify any long-running jobs that may be causing the lock.
  System Restart: In extreme cases, if the lock cannot be released and is causing significant issues, a system restart may be necessary, but this should be done with caution and typically as a last resort.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: View system logs.
  SM66: Monitor global work processes.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation for best practices on managing locks and transactions in your specific SAP environment.
  
  Preventive Measures:
  
  User Training: Ensure users are trained on how to properly complete transactions to avoid leaving locks.
  Monitoring: Regularly monitor system performance and lock situations to proactively address potential issues.
  Timeout Settings: Consider adjusting timeout settings for transactions to automatically release locks after a certain period of inactivity.
  
  By following these steps, you should be able to resolve the UJCTRL_EXCEPTION028 error and prevent it from occurring in the future.