How To Fix 0D666 - Structure being generated by another user; generation not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: 0D - FS-CD General Messages

• Message number: 666

• Message text: Structure being generated by another user; generation not possible

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 0D666 - Structure being generated by another user; generation not possible ?

  The SAP error message "0D666 Structure being generated by another user; generation not possible" typically occurs when multiple users attempt to generate or modify the same structure in the Data Dictionary (SE11) at the same time. This can lead to conflicts, as SAP does not allow concurrent modifications to the same object to maintain data integrity.
  Cause:
  
  Concurrent Access: Another user is currently generating or modifying the same structure.
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. When one user is working on a structure, it is locked for others.
  Long-running Processes: If a user has a long-running transaction that involves the structure, it may remain locked for an extended period.
  
  Solution:
  
  Wait and Retry: The simplest solution is to wait for the other user to finish their work. Once the lock is released, you can try generating the structure again.
  Check Lock Entries: You can check which user is holding the lock by using transaction code SM12. This will show you the lock entries and the users associated with them.
  Release Locks: If you have the necessary authorizations and it is appropriate to do so, you can manually delete the lock entry in SM12. However, this should be done with caution, as it may disrupt the other user's work.
  Communicate with Users: If you are in a team environment, communicate with your colleagues to coordinate changes to the structure to avoid conflicts.
  Review Background Jobs: Sometimes, background jobs may hold locks. Check transaction SM37 to see if any background jobs are running that might be causing the lock.
  
  Related Information:
  
  Transaction Codes:
  
  SE11: Data Dictionary (to view and modify structures).
  SM12: Display and manage lock entries.
  SM37: Monitor background jobs.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Authorizations: Ensure that users have the appropriate authorizations to access and modify the structures in the Data Dictionary.
  
  By following these steps, you should be able to resolve the error and successfully generate the structure in SAP.