How To Fix CNV_NCE_BAS246 - Mapping values are not valid; conversion simulation is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 246

• Message text: Mapping values are not valid; conversion simulation is not possible

What causes this issue?

The Number Conversion Engine has detected that mapping values for a
subobject of the corresponding number range object have been changed
since the last analysis run (e.g. new mapping values have been created).
Existing mapping values for number range objects are not more valid.
Initialization of mapping values for number range objects is required.

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?

Execute the activity 'Initialize Mapping Values for Number Range
Objects' again. The Number Conversion Engine will update mapping values
for the relevant number range objects. You need to execute the activity
'Specify Mapping Values for Number Range Objects' after that again.

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_BAS246 - Mapping values are not valid; conversion simulation is not possible ?

  The SAP error message CNV_NCE_BAS246 indicates that there is an issue with the mapping values during a data conversion process, typically in the context of a data migration or conversion project using SAP's tools. This error suggests that the values being mapped do not conform to the expected format or valid range, making it impossible to simulate the conversion.
  Causes:
  
  Invalid Mapping Values: The values specified in the mapping do not exist in the target system or are not valid according to the defined mapping rules.
  Data Type Mismatch: The source and target fields may have incompatible data types, leading to conversion issues.
  Missing Configuration: Required configuration settings or mapping definitions may be missing or incorrectly set up.
  Inconsistent Data: The source data may contain inconsistencies or errors that prevent successful mapping.
  Custom Logic Issues: If there are custom conversion routines or logic, they may not be functioning correctly.
  
  Solutions:
  
  Check Mapping Configuration: Review the mapping configuration to ensure that all values are correctly defined and valid for the target system.
  Validate Source Data: Inspect the source data for any inconsistencies or invalid entries that may be causing the issue.
  Data Type Verification: Ensure that the data types of the source and target fields are compatible and correctly defined.
  Review Custom Logic: If custom conversion logic is used, verify that it is functioning as intended and does not contain errors.
  Consult Documentation: Refer to SAP documentation or notes related to the specific conversion tool you are using for any known issues or additional troubleshooting steps.
  Test with Sample Data: If possible, test the mapping with a smaller set of sample data to isolate the issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Transaction Codes: Familiarize yourself with transaction codes related to data migration, such as LSMW (Legacy System Migration Workbench) or other specific tools used in your project.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed and resolved by other users.
  
  If the issue persists after following these steps, it may be beneficial to reach out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.