How To Fix CNV741 - For table &, duplicates were created during multicopy

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 741

• Message text: For table &, duplicates were created during multicopy

What causes this issue?

While copies were being created, duplicate entries with the same key
have come into existence for a given original record.

System Response

The duplicate entries were merged. The key of the original record is
written into the log.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV741 - For table &, duplicates were created during multicopy ?

  The SAP error message CNV741 indicates that during a multicopy operation, duplicates were created for a specific table. This typically occurs in the context of data migration or data transformation processes, often when using tools like SAP's Data Migration Workbench or during system conversions.
  Cause:
  
  Duplicate Entries: The most common cause of this error is that the source data contains duplicate entries that violate the uniqueness constraints of the target table.
  Incorrect Mapping: If the mapping of fields from the source to the target table is not correctly defined, it can lead to the creation of duplicate records.
  Data Integrity Issues: There may be underlying data integrity issues in the source data that were not addressed before the multicopy operation.
  Configuration Errors: Misconfiguration in the settings of the data migration tool or process can also lead to this error.
  
  Solution:
  
  Identify Duplicates: Review the source data to identify any duplicate entries that may be causing the issue. You can use SQL queries or data profiling tools to find duplicates.
  Clean Source Data: Remove or consolidate duplicate records in the source data before performing the multicopy operation again.
  Adjust Mapping: Ensure that the mapping of fields from the source to the target table is correct and does not lead to duplicates.
  Check Constraints: Review the constraints defined on the target table to ensure that they align with the data being migrated.
  Use Unique Identifiers: If applicable, ensure that unique identifiers are used in the source data to prevent duplicates during the copy process.
  Test in a Sandbox: Before executing the multicopy operation in the production environment, test it in a sandbox or development environment to ensure that the issue is resolved.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to the CNV741 error for any specific patches or updates that may address this issue.
  Documentation: Review the documentation for the data migration tool you are using to understand its configuration and how to handle duplicates.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  By addressing the root cause of the duplicates and ensuring that the data is clean and correctly mapped, you should be able to resolve the CNV741 error and successfully complete the multicopy operation.