How To Fix UGMD405 - DDIC structures already being generated by user &1

SAP Error Message - Details

• Message type: E = Error

• Message class: UGMD - FIN Master Data: Messages

• Message number: 405

• Message text: DDIC structures already being generated by user &1

What causes this issue?

The database tables and structures must be regenerated. User &V1& has
already started the generation. This activity can take several minutes.

System Response

Processing is terminated.

How to fix this error?

Wait a while and then start the function again.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UGMD405 - DDIC structures already being generated by user &1 ?

  The SAP error message UGMD405 indicates that there is an attempt to generate Data Dictionary (DDIC) structures that are already being generated by another user. This typically occurs in environments where multiple users are working on the same objects or when there are concurrent processes trying to modify or generate the same DDIC objects.
  Cause:
  
  Concurrent Access: Another user or process is currently generating or modifying the same DDIC structures.
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If a user is already working on a DDIC object, other users will be blocked from making changes until the first user completes their task.
  Long-running Processes: Sometimes, a process may take longer than expected, leading to other users encountering this error.
  
  Solution:
  
  Wait and Retry: The simplest solution is to wait for a few moments and then try to generate the DDIC structures again. The other user or process may complete their task shortly.
  Identify the Lock: Use transaction code SM12 to check for locks on the DDIC objects. You can see which user is holding the lock and, if necessary, contact them to understand their progress.
  Release Locks: If you have the necessary authorizations and it is appropriate to do so, you can release the lock using transaction SM12. However, be cautious with this approach as it may lead to data inconsistencies if the other user is still working on the object.
  Check Background Jobs: If the generation is being done as part of a background job, check transaction SM37 to see if there are any long-running jobs that might be causing the lock.
  Coordinate with Team: If multiple users are working on the same DDIC objects, it may be beneficial to coordinate efforts to avoid conflicts.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM37: To monitor background jobs.
  SE11: To access the Data Dictionary and check the status of objects.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message or provide additional troubleshooting steps.
  Documentation: Review SAP documentation on Data Dictionary management and locking mechanisms for a deeper understanding of how to manage concurrent access.
  
  By following these steps, you should be able to resolve the UGMD405 error and successfully generate the required DDIC structures.