How To Fix DG311 - Change number &1 is already locked

DG311 - Overview

• Message type: E = Error

• Message class: DG - DG: Messages for Dangerous Goods Management

• Message number: 311

• Message text: Change number &1 is already locked

What causes this issue?

You want to create or process the change number &V1&. This means that
one of the following situations led to an error message:
The change master record is currently being created or processed by
another user.
The change master record was being processed, but the system has not
yet updated it.
Another user is changing the object with reference to the change number
&V1&.
Another user has flagged the object change with a revision status, with
regard to the change number &V1&.

How to fix this error?

Process the change number later, or find out the reason why the object
'ECAENRS' is locked by contacting the user responsible.
You can use transaction 'SM12' to determine which user is currently
locking the change number entered for theblocked object 'ECAENRS'.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DG311 - Change number &1 is already locked ?

  The SAP error message DG311, which states "Change number &1 is already locked," typically occurs in the context of change management within SAP, particularly when dealing with change numbers in the Change Management module (often related to the Engineering Change Management (ECM) functionality).
  
  Cause:
  The error indicates that the change number you are trying to access or modify is currently locked by another user or process. This can happen for several reasons:
  
  Concurrent Access: Another user is currently editing or processing the same change number.
  Incomplete Transactions: A previous transaction involving the change number was not completed properly, leaving it in a locked state.
  System Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If a change number is being used in a transaction, it will be locked until that transaction is completed.
  
  
  Solution:
  To resolve the DG311 error, you can take the following steps:
  
  
  Check Lock Entries:
  
  Use transaction code SM12 to check for lock entries