How To Fix CNV_10100246 - Generated set name &4 for set &1 &2 &3 already exists, see mapping table

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10100 - Messages from package 10100

• Message number: 246

• Message text: Generated set name &4 for set &1 &2 &3 already exists, see mapping table

What causes this issue?

The system could not assign a unique set name in the generated set name
mapping table.

System Response

The conversion requires a unique set name. A duplicate set name will
cause an mapping table error.

How to fix this error?

Please check the set name mapping table and assign a new set name.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10100246 - Generated set name &4 for set &1 &2 &3 already exists, see mapping table ?

  The SAP error message CNV_10100246 indicates that there is an attempt to create a generated set name that already exists in the system. This error typically occurs during data migration or conversion processes, particularly when using SAP's Conversion Tools or Data Migration tools.
  Cause:
  The error arises when:
  
  A generated set name (which is usually a unique identifier for a set of data) is being created, but a set with the same name already exists in the mapping table.
  This can happen if the same data migration process is run multiple times without proper cleanup or if there are overlapping data sets being processed.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Sets: 
  
  Review the mapping table to identify the existing set names. You can do this by accessing the relevant transaction or table where the mapping is stored (e.g., using transaction codes like SE11 or SE16).
  
  
  
  Modify the Set Name:
  
  If you are able to modify the process or the parameters being used, consider changing the name of the generated set to ensure it is unique.
  
  
  
  Cleanup Existing Data:
  
  If the existing set is no longer needed, you may delete or archive it, allowing the new set to be created without conflict.
  
  
  
  Review Migration Logic:
  
  Ensure that the logic used for generating set names is robust and accounts for existing names. This may involve adding a timestamp or unique identifier to the set name.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool you are using. There may be specific guidelines or best practices for handling set names.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot resolve it, consider reaching out to SAP support for further assistance. They may provide insights specific to your version or configuration.
  
  
  
  Related Information:
  
  Mapping Table: This is a critical component in data migration that maps source data to target structures. Understanding its structure and contents is essential for troubleshooting.
  Data Migration Tools: Familiarize yourself with the specific tools and methodologies used in your SAP environment for data migration, as they may have unique configurations or settings that affect set name generation.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context or solutions.
  
  By following these steps, you should be able to resolve the error and proceed with your data migration or conversion tasks.