How To Fix UMM_CUSTOMIZING001 - User '&1' is already using the transaction

UMM_CUSTOMIZING001 - Overview

• Message type: E = Error

• Message class: UMM_CUSTOMIZING - Messages from the Management Cockpit Maintenance Transaction

• Message number: 001

• Message text: User '&1' is already using the transaction

What causes this issue?

Because of the multiple use of the objects of a Management Cockpit, the
transaction cannot be started by more than one user at any one time.

System Response

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

How to fix this error?

Call up the transaction at a later point in time, or contact the
processor "&V1".

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

UMM_CUSTOMIZING001 - Details

• The SAP error message UMM_CUSTOMIZING001 indicates that a user is trying to access a transaction that is already being used by another session or user. This is a common issue in SAP environments where multiple users may attempt to access the same transaction simultaneously.
  
  Cause:
  
  Concurrent Access: The primary cause of this error is that the transaction is already open in another session by the same user or by another user.
  Lock Mechanism: SAP has a locking mechanism to prevent data inconsistencies. When a user opens a transaction, it locks certain resources, and if another user tries to access the same transaction, they may encounter this error.
  Session Management: If a user has multiple sessions open, they may inadvertently try to access the same transaction in more than one session.
  
  
  Solution:
  
  Check Active Sessions: The user should check if they have multiple sessions open and close any unnecessary ones. They can do this by logging out