How To Fix /SCWM/CORE033 - Can't run this report, table /SCWM/WHO is locked by another user

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/CORE -

• Message number: 033

• Message text: Can't run this report, table /SCWM/WHO is locked by another user

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/CORE033 - Can't run this report, table /SCWM/WHO is locked by another user ?

  The SAP error message /SCWM/CORE033 indicates that a report cannot be executed because the table /SCWM/WHO is currently locked by another user. This typically occurs in the SAP Extended Warehouse Management (EWM) module when multiple users or processes attempt to access or modify the same data simultaneously.
  Cause:
  
  Concurrent Access: Another user or process is currently accessing or modifying the data in the /SCWM/WHO table, which leads to a lock being placed on it.
  Long-Running Transactions: A transaction that takes a long time to complete may hold the lock longer than expected.
  System Performance Issues: High system load or performance issues may cause locks to persist longer than usual.
  
  Solution:
  
  Wait and Retry: The simplest solution is to wait for the other user or process to complete their transaction. After some time, the lock should be released, and you can try running the report again.
  Identify the Lock: Use transaction code SM12 to check for locks on the /SCWM/WHO table. You can see which user or process is holding the lock.
  
  In SM12, enter the table name /SCWM/WHO and execute. This will show you the locks currently held on that table.
  
  
  Release the Lock: If you identify a lock that is no longer needed (for example, if the user has logged off or the process has hung), you can manually delete the lock entry in SM12. However, be cautious with this approach, as it may lead to data inconsistencies if the process is still running.
  Check for Long-Running Processes: Use transaction SM66 to monitor active processes in the system. If you find a long-running process that is holding the lock, you may need to investigate further or contact the user responsible.
  System Performance: If this issue occurs frequently, consider reviewing system performance and optimizing long-running transactions or processes that may be causing locks.
  
  Related Information:
  
  Lock Management: Understanding how SAP handles locks is crucial. Locks are used to maintain data integrity during concurrent access.
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM66: Monitor global work processes.
  SM21: Check system logs for any related errors or warnings.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the /SCWM/WHO table or locking mechanisms in EWM.
  
  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.