How To Fix S1490 - Table TCOLL is locked by user &

SAP Error Message - Details

• Message type: E = Error

• Message class: S1 - Statistik / SAP-Monitor

• Message number: 490

• Message text: Table TCOLL is locked by user &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message S1490 - Table TCOLL is locked by user & ?

  The SAP error message S1490 indicates that the table TCOLL is currently locked by a user, which prevents other users from accessing or modifying the table. This can occur in various scenarios, such as during data updates, batch jobs, or when a user is performing a transaction that involves the table.
  Cause:
  
  User Lock: A user is currently accessing or modifying the TCOLL table, which is causing the lock.
  Long-Running Transactions: A transaction that takes a long time to complete may hold the lock longer than expected.
  Batch Jobs: Background jobs that are processing data related to the TCOLL table may also lock it.
  Deadlocks: In some cases, a deadlock situation may arise where two or more processes are waiting for each other to release locks.
  
  Solution:
  
  
  Identify the Locking User:
  
  Use transaction code SM12 to view the list of locks in the system. You can filter by the table name (TCOLL) to find the specific lock.
  Check the user who is holding the lock and the transaction they are executing.
  
  
  
  Release the Lock:
  
  If the locking user is identified and it is safe to do so, you can manually delete the lock entry from SM12. However, this should be done with caution, as it may lead to data inconsistency if the user is still performing operations on the table.
  Communicate with the user to understand why the lock is in place and if they can complete or cancel their transaction.
  
  
  
  Check for Long-Running Transactions:
  
  If a transaction is taking too long, investigate the reason for the delay. It may be necessary to optimize the transaction or check for performance issues.
  
  
  
  Review Batch Jobs:
  
  If a background job is causing the lock, you may need to review the job's logic or schedule it during off-peak hours to minimize conflicts.
  
  
  
  Monitor for Deadlocks:
  
  If deadlocks are suspected, consider implementing better transaction management practices to avoid them.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related errors or warnings.
  ST22: To analyze dumps that may provide insight into issues causing locks.
  
  
  
  Best Practices:
  
  Regularly monitor and manage long-running transactions and batch jobs.
  Educate users on proper transaction handling to minimize locking issues.
  Implement proper error handling in custom programs to avoid unintentional locks.
  
  
  
  If the issue persists or if you are unsure about releasing locks, it is advisable to consult with your SAP Basis team or system administrator for further assistance.