How To Fix CNV_NCE_BAS108 - NR mapping values for &1 and &2 result in duplicates (number &3)

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 108

• Message text: NR mapping values for &1 and &2 result in duplicates (number &3)

What causes this issue?

Source numbers that belong to the different NR intervals are mapped to
the same target numbers. These mappings are not acceptable since they
will result in duplicate numbers during conversion. You can find an
example of the duplicate values in the message text.

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?

Correct mappings for the conflicting NR intervals so that they do not
result in duplicate numbers.
&FURTHER_HINTS&
Information about conflicting NR intervals is generally given in the
following form:
<source subobject value>/<source number range number>/<(>
<<)>source to-year>.
Since there could exist the temporary number intervals without
corresponding number range numbers (they are built from the values that
do not belong to any number range interval), the information about them
comes in the other form:
<source subobject value>/<first number of the source number
interval>/<source to-year>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_NCE_BAS108 - NR mapping values for &1 and &2 result in duplicates (number &3) ?

  The SAP error message CNV_NCE_BAS108 indicates that there are duplicate mapping values in the context of a data conversion or migration process. This error typically arises during the execution of a conversion program, particularly when mapping values from one system to another, such as during a system upgrade or data migration.
  Cause:
  The error message specifies that there are duplicate entries for the mapping values associated with the specified fields (&1 and &2). The number of duplicates is indicated by &3. This situation can occur due to several reasons:
  
  Data Quality Issues: The source data may contain duplicates that were not identified or cleaned up prior to the migration.
  Mapping Configuration: The mapping configuration may not be set up correctly, leading to multiple source values being mapped to the same target value.
  Incorrect Transformation Logic: The transformation logic applied during the mapping process may inadvertently create duplicates.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify Duplicates:
  
  Review the source data for the fields indicated by &1 and &2 to identify the duplicate entries. You can use SQL queries or data analysis tools to find duplicates.
  
  
  
  Data Cleansing:
  
  Clean the source data to remove or consolidate duplicates. This may involve deciding which records to keep based on business rules or data quality standards.
  
  
  
  Review Mapping Configuration:
  
  Check the mapping configuration in the conversion program. Ensure that the mapping logic is correctly defined and that it does not lead to multiple source values mapping to the same target value.
  
  
  
  Adjust Transformation Logic:
  
  If the transformation logic is causing duplicates, modify it to ensure that it handles duplicates appropriately. This may involve aggregating values or applying additional filters.
  
  
  
  Testing:
  
  After making the necessary changes, re-run the conversion process in a test environment to ensure that the error is resolved and that the data is correctly mapped without duplicates.
  
  
  
  Documentation:
  
  Document the changes made to the mapping and data cleansing processes to ensure that similar issues can be avoided in future migrations.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to the CNV_NCE_BAS108 error for any specific recommendations or patches that may address the issue.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration, including data profiling, cleansing, and validation techniques.
  SAP Community: Engage with the SAP Community forums to seek advice from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the CNV_NCE_BAS108 error and successfully complete your data migration or conversion process.