How To Fix CD405 - Table & is locked. Generation is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: CD - Change Documents

• Message number: 405

• Message text: Table & is locked. Generation is not possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CD405 - Table & is locked. Generation is not possible ?

  The SAP error message CD405, which states "Table & is locked. Generation is not possible," typically occurs when a table in the SAP system is locked, preventing any changes or generation processes from being executed on that table. This can happen for various reasons, such as ongoing maintenance activities, a previous session that did not close properly, or a lock that was not released due to an error.
  Causes:
  
  Active Lock: The table is currently being accessed or modified by another user or process, leading to a lock.
  Incomplete Transactions: A previous transaction that involved the table did not complete successfully, leaving the table in a locked state.
  Database Locks: Locks at the database level can also cause this issue, especially if there are long-running transactions.
  Development Activities: If you are working in a development environment, a developer might have locked the table for changes.
  
  Solutions:
  
  
  Check Lock Entries:
  
  Use transaction code SM12 to check for lock entries. You can filter by the table name or user to identify who is holding the lock.
  If you find a lock that is no longer needed, you can delete it (if you have the necessary authorizations).
  
  
  
  Release Locks:
  
  If you have the appropriate permissions, you can manually release the lock from the SM12 transaction.
  Ensure that the user or process holding the lock is not actively using it before releasing it.
  
  
  
  Wait for Completion:
  
  If the lock is due to an ongoing process, you may need to wait for that process to complete. Check with the user or team responsible for the process.
  
  
  
  Check for Background Jobs:
  
  Use transaction code SM37 to check for any background jobs that might be running and holding locks on the table.
  
  
  
  Restart the Session:
  
  If the lock is due to a session that did not close properly, logging out and back in may help.
  
  
  
  Contact Basis Team:
  
  If you are unable to resolve the issue, contact your SAP Basis team for assistance. They can help identify the cause of the lock and take appropriate actions.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM37: Monitor background jobs.
  SE11: Data Dictionary, where you can check the table definition.
  
  
  
  Documentation: Refer to SAP Notes and documentation for specific details related to your version of SAP, as there may be version-specific considerations.
  
  
  Best Practices: Regularly monitor and manage locks in your SAP environment to prevent issues related to locked tables. Implementing proper transaction handling and user training can also help minimize occurrences of this error.
  
  
  By following these steps, you should be able to identify the cause of the CD405 error and take appropriate action to resolve it.