How To Fix CNV_NCE_BAS240 - NR interval &1: duplicate entries exist

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 240

• Message text: NR interval &1: duplicate entries exist

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_NCE_BAS240 - NR interval &1: duplicate entries exist ?

  The SAP error message CNV_NCE_BAS240 NR interval &1: duplicate entries exist typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there are duplicate entries in the data being processed, which violates the uniqueness constraints expected by the system.
  Cause:
  
  
  Duplicate Data: The most common cause of this error is that the data being imported or converted contains duplicate entries for a specific key or interval. This could be due to:
  
  Data extraction issues where the source system had duplicates.
  Incorrect mapping or transformation rules that lead to duplicates.
  Manual data entry errors in the source data.
  
  
  
  Configuration Issues: Sometimes, the configuration of the target system may expect unique values for certain fields, and if the incoming data does not meet these requirements, it can trigger this error.
  
  
  Solution:
  
  
  Identify Duplicates: 
  
  Review the data set that is being imported or converted. Use tools like Excel or SQL queries to identify duplicate entries based on the key fields that are causing the issue.
  Check the specific interval mentioned in the error message (replace &1 with the actual interval value) to narrow down the search.
  
  
  
  Clean Up Data:
  
  Remove or consolidate duplicate entries in the source data. This may involve:
  
  Deleting duplicates.
  Merging records if they contain complementary information.
  Ensuring that the data adheres to the expected format and uniqueness constraints.
  
  
  
  
  
  Adjust Mapping/Transformation:
  
  If the duplicates are a result of incorrect mapping or transformation rules, review and adjust these rules to ensure that they produce unique entries.
  
  
  
  Re-run the Migration: After cleaning up the data, re-run the migration or conversion process to see if the error persists.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any additional guidance or known issues.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration, including data cleansing, validation, and testing.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  
  By following these steps, you should be able to resolve the CNV_NCE_BAS240 error and successfully complete your data migration or conversion process.