How To Fix CNV_NCE_BAS090 - One to One Mapping not changeable

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 090

• Message text: One to One Mapping not changeable

What causes this issue?

One to One Mapping values displayed here have been transferred from
Mapping Engine maintenance. You are not allowed to change these values
here, they are changeable only in Mapping Engine maintenance.

System Response

System will not switch to change mode.

How to fix this error?

If you want to change mapping values shown here please re-execute
activity <ZK>Specify Mapping Values</>.

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_BAS090 - One to One Mapping not changeable ?

  The SAP error message CNV_NCE_BAS090 ("One to One Mapping not changeable") typically occurs in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that a specific mapping configuration is locked or cannot be modified due to certain constraints.
  Cause:
  
  Mapping Lock: The one-to-one mapping you are trying to change is locked because it has already been used in a previous step of the migration process.
  Data Integrity: The system may prevent changes to ensure data integrity and consistency during the migration process.
  Configuration Settings: Certain settings in the migration cockpit or the configuration of the migration project may restrict changes to mappings.
  
  Solution:
  
  Check Mapping Status: Verify the status of the mapping you are trying to change. If it has been used in a previous migration step, you may need to revert or adjust that step first.
  Review Migration Steps: Go through the migration steps to ensure that you are not trying to modify a mapping that is already in use. If necessary, you may need to delete or adjust the previous steps.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be guidelines on how to handle locked mappings.
  Use a Different Mapping: If the mapping is locked and cannot be changed, consider creating a new mapping or using an alternative approach to achieve your data migration goals.
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They may provide insights specific to your system configuration and migration scenario.
  
  Related Information:
  
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it is often the tool involved in such errors.
  Data Migration Best Practices: Review best practices for data migration in SAP environments to avoid common pitfalls.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.