How To Fix CNV_OM064 - Mass transfer ID &1 already exists in data set

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_OM - Messages for Objectbased Migration

• Message number: 064

• Message text: Mass transfer ID &1 already exists in data set

Self-Explanatory Message

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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_OM064 - Mass transfer ID &1 already exists in data set ?

  The SAP error message CNV_OM064 indicates that a mass transfer ID already exists in the dataset you are trying to work with. This error typically occurs during data migration or data transfer processes, particularly when using SAP's data migration tools or during the execution of mass data transfer programs.
  Cause:
  The error is caused by the attempt to create or insert a mass transfer ID that already exists in the system. This can happen due to:
  
  Duplicate entries in the source data.
  An incomplete or interrupted previous data transfer that left behind a mass transfer ID.
  A configuration issue where the system is not correctly identifying existing entries.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check for Existing Mass Transfer IDs:
  
  Use transaction codes like SE16 or SE11 to check the relevant database tables (e.g., CNV_MBT_MASS_TRANSFER) for existing mass transfer IDs.
  Identify if the ID you are trying to create already exists.
  
  
  
  Remove or Update Existing Entries:
  
  If the existing mass transfer ID is no longer needed, you can delete it from the dataset.
  If the ID is still relevant, consider updating the existing entry instead of creating a new one.
  
  
  
  Review Source Data:
  
  Ensure that your source data does not contain duplicates. Clean up the data before attempting the transfer again.
  
  
  
  Check for Incomplete Transfers:
  
  Investigate if there were any previous data transfer attempts that were incomplete. If so, you may need to complete or roll back those transfers.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the specific data migration tool you are using for any additional troubleshooting steps or known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE16 (Data Browser), SE11 (Data Dictionary), and others that may help in analyzing the data.
  SAP Notes: Check for any SAP Notes related to the CNV_OM064 error for specific patches or updates that may address the issue.
  Data Migration Tools: Understand the specific data migration tools you are using (e.g., SAP S/4HANA Migration Cockpit, LSMW) and their configurations.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.