How To Fix CNV_MBT477 - It's recommended to create a system message before locking users

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 477

• Message text: It's recommended to create a system message before locking users

What causes this issue?

The user locking processes has already started in background, but no
system message was created.

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?

We recommend that you create a system message in order to inform the
relevant users about the user locking.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT477 - It's recommended to create a system message before locking users ?

  The SAP error message CNV_MBT477 indicates that there is a recommendation to create a system message before locking users in the context of a data migration or conversion process. This message typically arises during the execution of a migration project, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
  Cause:
  The error message CNV_MBT477 is triggered when the system detects that user accounts are about to be locked, which could lead to issues during the migration process. Locking users without prior notification can result in confusion or data inconsistencies, especially if users are unaware that they will be unable to access the system.
  Solution:
  To resolve this issue, follow these steps:
  
  
  Create a System Message:
  
  Before proceeding with locking any user accounts, create a system message or notification to inform users about the upcoming lock. This can be done through various communication channels, such as email, internal messaging systems, or SAP's own messaging tools.
  
  
  
  Lock Users:
  
  Once the users have been informed, you can proceed to lock the user accounts as necessary. This can typically be done through transaction codes like SU01 (User Maintenance) or SU10 (Mass User Maintenance).
  
  
  
  Monitor Migration Process:
  
  After locking the users, continue with the migration process while ensuring that no unauthorized access occurs during this critical phase.
  
  
  
  Unlock Users Post-Migration:
  
  Once the migration is complete and verified, unlock the user accounts and notify them that they can resume their activities.
  
  
  
  Related Information:
  
  User Locking Procedures: Familiarize yourself with the procedures for locking and unlocking users in SAP. This is crucial for maintaining system integrity during migrations.
  Communication Plans: Establish a clear communication plan for informing users about system changes, especially during migrations or upgrades.
  Migration Best Practices: Review SAP's best practices for data migration, which often include user management as a key component.
  SAP Notes: Check for any relevant SAP Notes that may provide additional context or updates regarding this error message.
  
  By following these steps, you can effectively manage user access during migration processes and avoid potential disruptions.