How To Fix CNV_NCE_BAS203 - Number &1: target number is changed from &2 to &3

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 203

• Message text: Number &1: target number is changed from &2 to &3

What causes this issue?

The program had to adjust an automatically generated one-to-one mapping
&V1& -> &V2&.

System Response

The system generates one-to-one mapping values to resolve a problem of
duplicate numbers. It maps one of the duplicate numbers to the first
free number in the target number range interval. Since new numbers are
constantly created in the productive system, it is possible that a
previously used target number is no longer available. In this case, the
system has to adjust the mapping and choose the first free number in the
target number range interval again.

How to fix this error?

Check the generated mapping values. You can correct it and select
another target number. Note, that in this case the system will not do
any automatic adjustments anymore.

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_NCE_BAS203 - Number &1: target number is changed from &2 to &3 ?

  The SAP error message CNV_NCE_BAS203 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 a target number (such as a key or identifier) has changed unexpectedly during the migration process.
  Cause:
  The error message CNV_NCE_BAS203 is triggered when:
  
  The target number (e.g., a unique identifier for a record) has been altered from its original value to a new value during the migration process.
  This can happen due to various reasons, such as:
  
  Data mapping issues where the source and target systems have different configurations or structures.
  Duplicate records in the source data that lead to conflicts in the target system.
  Changes in the data transformation rules that result in different target values than expected.
  
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Migration Mapping:
  
  Check the mapping configuration between the source and target systems to ensure that the data is being transformed correctly.
  Ensure that the fields are correctly aligned and that there are no discrepancies in the data types or formats.
  
  
  
  Check for Duplicates:
  
  Investigate the source data for any duplicate records that might be causing conflicts during the migration.
  Resolve any duplicates before attempting the migration again.
  
  
  
  Analyze the Logs:
  
  Review the migration logs for more detailed information about the specific records that are causing the issue.
  Look for patterns or specific records that are consistently causing the error.
  
  
  
  Adjust Transformation Rules:
  
  If necessary, modify the transformation rules to ensure that the target values are generated as expected.
  This may involve changing how certain fields are populated or ensuring that the correct logic is applied during the migration.
  
  
  
  Test Migration:
  
  Conduct a test migration with a smaller dataset to identify and resolve issues before performing a full migration.
  This can help isolate the problem and allow for adjustments without impacting the entire dataset.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool you are using for any known issues or additional troubleshooting steps.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide guidance based on your specific scenario.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific tool you are using for data migration.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the root cause of the CNV_NCE_BAS203 error and implement a solution to resolve it.