How To Fix CNV_DMC_WDA023 - Mass transfer ID &1 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_WDA - Messages used in WDA UI

• Message number: 023

• Message text: Mass transfer ID &1 already exists

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_WDA023 - Mass transfer ID &1 already exists ?

  The SAP error message CNV_DMC_WDA023 indicates that a mass transfer ID you are trying to create or use already exists in the system. This error typically occurs during data migration processes, particularly when using the SAP Data Migration Cockpit or similar tools.
  Cause:
  The error is caused by attempting to create a new mass transfer ID that duplicates an existing one. Mass transfer IDs are unique identifiers used to manage and track data migration tasks, and the system does not allow for duplicates to ensure data integrity and proper tracking.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Mass Transfer IDs:
  
  Use transaction codes like SE16 or SE11 to access the relevant database tables (e.g., DMC_MASS_TRANSFER) and check for existing mass transfer IDs.
  Identify the mass transfer ID that is causing the conflict.
  
  
  
  Use a Different Mass Transfer ID:
  
  If you are creating a new mass transfer ID, choose a different, unique identifier that does not already exist in the system.
  
  
  
  Delete or Modify Existing Mass Transfer ID:
  
  If the existing mass transfer ID is no longer needed, you may consider deleting it. However, be cautious with this approach, as it may affect ongoing or completed data migration tasks.
  Alternatively, if you have the necessary permissions, you can modify the existing mass transfer ID to free up the one you want to use.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation related to the Data Migration Cockpit or the specific migration tool you are using for any additional guidelines or best practices regarding mass transfer IDs.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They may provide insights specific to your system configuration or version.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as DMC_MASS_TRANSFER or DMC_MIGRATION for managing data migration tasks.
  Data Migration Cockpit: Understand the functionalities and limitations of the SAP Data Migration Cockpit, as it may have specific requirements for mass transfer IDs.
  SAP Notes: Check for any SAP Notes related to this error message for patches or updates that may address known issues.
  
  By following these steps, you should be able to resolve the CNV_DMC_WDA023 error and continue with your data migration process.