How To Fix CNV_NCE_BAS427 - Duplicate mapping values for number range intervals found

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 427

• Message text: Duplicate mapping values for number range intervals found

What causes this issue?

Duplicate mapping values found for number range interval ( OBJECT = &V1&
/ SUBOBJECT = &V2& / NRRANGENR = &V3& / TOYEAR = &V4& ).

System Response

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

How to fix this error?

Return to the <ZK>Mapping Values for Number Range Intervals</> tab page,
and enter the required data.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_NCE_BAS427 - Duplicate mapping values for number range intervals found ?

  The SAP error message CNV_NCE_BAS427 indicates that there are duplicate mapping values for number range intervals found during a data conversion or migration process. This typically occurs in the context of using the SAP Conversion Tools, particularly when mapping data from one system to another or when setting up number ranges for various objects.
  Cause:
  The error is caused by having overlapping or duplicate entries in the number range mapping configuration. This can happen if:
  
  Two or more entries in the mapping table have the same number range defined for the same object.
  The intervals defined for the number ranges overlap, leading to ambiguity in which number range should be used for a given object.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify Duplicate Entries:
  
  Check the mapping configuration for number ranges. Look for entries that have the same number range or overlapping intervals.
  You can use transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to view the relevant tables where the mappings are stored.
  
  
  
  Correct the Mapping:
  
  Remove or modify the duplicate or overlapping entries. Ensure that each number range is unique and does not overlap with others.
  If necessary, create new number ranges to avoid conflicts.
  
  
  
  Validate Number Ranges:
  
  After making changes, validate the number ranges to ensure that they are correctly configured and do not have any overlaps.
  You can use transaction code SNRO to manage number ranges and check their status.
  
  
  
  Test the Configuration:
  
  Once the duplicates are resolved, re-run the data migration or conversion process to ensure that the error does not occur again.
  
  
  
  Documentation:
  
  Document the changes made to the number range mappings for future reference and to avoid similar issues.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SNRO (Number Range Objects), SE11 (Data Dictionary), and SE16 (Data Browser) for managing number ranges and checking configurations.
  SAP Notes: Check SAP Notes for any specific guidance or patches related to the CNV_NCE_BAS427 error. SAP Notes can provide additional context or solutions based on the version of SAP you are using.
  Testing Environment: Always perform changes in a development or testing environment before applying them to production to avoid disruptions.
  
  By following these steps, you should be able to resolve the CNV_NCE_BAS427 error and ensure that your number range mappings are correctly configured.