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

0D666 - Overview

• 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.

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.

Unfortunately, there isn't any extra information in this error notice.

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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