How To Fix CNV_MBT484 - System message already successfully created

CNV_MBT484 - Overview

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 484

• Message text: System message already successfully created

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

CNV_MBT484 - Details

• The SAP error message CNV_MBT484 indicates that a system message has already been successfully created. This error typically arises in the context of data migration or conversion processes, particularly when using SAP's Migration Cockpit or similar tools.
  
  Cause:
  The error occurs when the system attempts to create a message that has already been processed or created successfully. This can happen due to:
  
  Duplicate execution of a migration or conversion task.
  An attempt to reprocess a message that has already been marked as completed.
  Issues with the underlying logic in the migration program that checks for existing messages.
  
  
  Solution:
  To resolve the CNV_MBT484 error, you can take the following steps:
  
  
  Check Existing Messages: 
  
  Review the logs or the message history to confirm that the message in question has indeed been created successfully. You can do this by navigating to the relevant transaction or report that logs these messages.
  
  
  
  Avoid Duplicate Execution:
  
  Ensure that you are not unintentionally executing the same migration