How To Fix CNV_20100321 - N:1 mapping of G/L accounts and cost elements

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20100 - Messageclass for chart of account conversion

• Message number: 321

• Message text: N:1 mapping of G/L accounts and cost elements

What causes this issue?

N:1 mapping of G/L accounts and/or cost elements
Following G/L account or cost element occurs more than once as a target
value:
Chart of accounts = &V1&, G/L account or cost element = &V2&.

System Response

Warning

How to fix this error?

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_20100321 - N:1 mapping of G/L accounts and cost elements ?

  The SAP error message CNV_20100321 typically relates to issues encountered during the mapping of General Ledger (G/L) accounts and cost elements in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
  Cause:
  The error message indicates that there is a problem with the mapping of G/L accounts and cost elements, specifically that there is a N:1 mapping issue. This means that multiple source accounts or cost elements are trying to map to a single target account or cost element, which is not allowed in the mapping process. This can occur due to:
  
  Duplicate Entries: Multiple source accounts or cost elements are mapped to the same target account.
  Incorrect Mapping Configuration: The mapping configuration may not be set up correctly, leading to conflicts.
  Data Quality Issues: The source data may contain inconsistencies or duplicates that need to be resolved before mapping.
  
  Solution:
  To resolve the CNV_20100321 error, you can follow these steps:
  
  
  Review Mapping Configuration:
  
  Check the mapping configuration in the migration tool to ensure that each source G/L account or cost element is mapped to a unique target account or cost element.
  Ensure that there are no duplicate mappings.
  
  
  
  Data Cleansing:
  
  Analyze the source data for duplicates or inconsistencies. Use data cleansing techniques to ensure that each source account or cost element is unique.
  If necessary, consolidate accounts or cost elements in the source data to eliminate duplicates.
  
  
  
  Adjust Mapping Rules:
  
  If the business logic allows, consider adjusting the mapping rules to accommodate the necessary mappings without conflicts.
  Ensure that the mapping aligns with the financial reporting and accounting requirements of the organization.
  
  
  
  Testing:
  
  After making adjustments, perform a test run of the migration process to ensure that the error is resolved and that the mapping works as intended.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool you are using for additional guidance on mapping configurations and best practices.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions for this specific error message.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it provides tools for data migration and mapping.
  Data Migration Best Practices: Review best practices for data migration in SAP environments to ensure a smooth transition and avoid common pitfalls.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance based on your specific system configuration and requirements.