How To Fix GT155 - Table & locked

SAP Error Message - Details

• Message type: E = Error

• Message class: GT - Database utilities

• Message number: 155

• Message text: Table & locked

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GT155 - Table & locked ?

  The SAP error message GT155, which states "Table & locked," typically indicates that a specific database table is currently locked, preventing access or modifications to that table. This can occur for various reasons, such as ongoing transactions, background jobs, or other processes that are using the table.
  Causes:
  
  Ongoing Transactions: A user or process is currently executing a transaction that involves the locked table.
  Background Jobs: A scheduled job may be running that locks the table for data processing.
  Long-running Processes: A transaction that takes a long time to complete may hold a lock on the table.
  Deadlocks: Situations where two or more processes are waiting for each other to release locks can also lead to this error.
  Database Maintenance: Maintenance tasks or updates being performed on the database can temporarily lock tables.
  
  Solutions:
  
  
  Identify the Lock:
  
  Use transaction codes like SM12 (Display and Delete Locks) to check which user or process is holding the lock on the table.
  You can also use SM21 (System Log) to look for any related error messages or logs.
  
  
  
  Wait for Completion:
  
  If the lock is due to a legitimate ongoing process, it may be best to wait until the process completes.
  
  
  
  Terminate the Lock:
  
  If you determine that the lock is unnecessary or is being held by a user who is no longer active, you can delete the lock entry in SM12. Be cautious with this approach, as it may lead to data inconsistencies if the process is still running.
  
  
  
  Check for Background Jobs:
  
  Use SM37 (Job Monitoring) to check if any background jobs are running that might be locking the table. If necessary, you can cancel the job.
  
  
  
  Review Application Logic:
  
  If the locking is frequent, review the application logic to ensure that transactions are being handled efficiently and that locks are being released promptly.
  
  
  
  Database Administration:
  
  Consult with your database administrator to check for any database-level locks or issues that may be causing the problem.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and Delete Locks
  SM21: System Log
  SM37: Job Monitoring
  SE11: Data Dictionary (to check table structure)
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific table or transaction you are working with.
  
  
  Performance Tuning: If locking issues are frequent, consider performance tuning of the database or application to minimize locking contention.
  
  
  Always ensure that you have the necessary authorizations and that you understand the implications of terminating locks or jobs before proceeding with any actions.