How To Fix J1B_NFE126 - Not possible to complete action; doc. &1 already changed by another user

SAP Error Message - Details

• Message type: E = Error

• Message class: J1B_NFE - Message class for NF-e

• Message number: 126

• Message text: Not possible to complete action; doc. &1 already changed by another user

What causes this issue?

You tried to make a change to an electronic fiscal document. However,
another user changed the document before you could complete your action.

System Response

The system updates the Monitor with the other user's changes for this
electronic fiscal document. Your actions are not implemented.

How to fix this error?

Check the status of the electronic fiscal document mentioned in the
error message. If necessary, make your changes again.
If you tried to change several electronic fiscal documents at one time,
repeat your actions for the documents that are not mentioned in the
error message.

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 J1B_NFE126 - Not possible to complete action; doc. &1 already changed by another user ?

  The SAP error message J1B_NFE126 indicates that a document (in this case, a fiscal document) is currently being modified by another user, and therefore, the action you are trying to perform cannot be completed. This is a common issue in multi-user environments where concurrent access to documents is possible.
  Cause:
  
  Concurrent Access: Another user has opened the document for editing, and the system locks it to prevent conflicting changes.
  Session Timeout: If a user has left a session open for an extended period, it may still hold a lock on the document.
  Database Lock: The document may be locked due to a previous transaction that did not complete properly.
  
  Solution:
  
  Check Document Status: Verify if another user is currently editing the document. You can do this by checking the document status or using transaction codes like SM12 (to view locks) or SM21 (to view system logs).
  Wait and Retry: If another user is editing the document, you may need to wait until they finish and release the lock. You can communicate with the user if possible.
  Release Locks: If you suspect that a lock is held unnecessarily (e.g., due to a session timeout), you can use transaction SM12 to manually release the lock. However, be cautious with this approach, as it may lead to data inconsistency if the other user is still working on the document.
  Check for Background Jobs: Sometimes, background jobs may also hold locks. Check if any jobs are running that might be affecting the document.
  System Restart: In rare cases, a system restart may be necessary to clear any persistent locks, but this should be done with caution and typically as a last resort.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related issues.
  SE11: To check the database table structure if needed.
  
  
  User Communication: If you are in a team environment, communicate with your colleagues to ensure that everyone is aware of who is working on which documents.
  Documentation: Refer to SAP documentation or support notes related to document locking and concurrency issues for more detailed guidance.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.