How To Fix CNV_NCE_BAS177 - Changes in subobject mappings are detected

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 177

• Message text: Changes in subobject mappings are detected

What causes this issue?

The system has detected that mapping values for a subobject of the
corresponding number range object have been changed since the activity
<ZK>Initialize Mapping Values for Number Range Objects</> was executed
(for example new mapping values have been created or existing mapping
values have been changed). This means that mapping values for number
range objects are not up to date.

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 <ZK>Initialize Mapping Values for Number Range
Objects</> again. The system will update all changed number range
objects.

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_BAS177 - Changes in subobject mappings are detected ?

  The SAP error message CNV_NCE_BAS177 indicates that there are changes in subobject mappings during a data migration or conversion process. This error typically arises in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other conversion tools used in the SAP landscape.
  Cause:
  The error occurs when the system detects that the mappings for subobjects (which could be related to data structures, fields, or relationships) have been altered since the last time the mapping was saved or executed. This can happen due to:
  
  Changes in Source Data Structure: If the source data structure has been modified (e.g., fields added, removed, or renamed), the existing mappings may no longer be valid.
  Changes in Target Data Structure: Similar changes in the target structure can also lead to this error.
  Manual Changes: If someone manually altered the mapping configuration after it was initially set up, this could trigger the error.
  Versioning Issues: If there are multiple versions of the mapping or if the migration tool has been updated, inconsistencies may arise.
  
  Solution:
  To resolve the CNV_NCE_BAS177 error, you can follow these steps:
  
  Review Mapping Configuration: Check the mapping configuration for any discrepancies. Ensure that the source and target structures are aligned and that all necessary fields are correctly mapped.
  Revalidate Mappings: Use the validation tools provided in the migration cockpit or conversion tool to revalidate the mappings. This can help identify specific issues.
  Check for Changes: Investigate any recent changes made to the source or target data structures. If changes were made, update the mappings accordingly.
  Consult Documentation: Refer to the SAP documentation related to the specific migration or conversion tool you are using. There may be specific guidelines or troubleshooting steps provided.
  Test in a Sandbox: If possible, replicate the issue in a sandbox environment to test changes without affecting production data.
  Seek Support: If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance.
  
  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 detailed guidance on mapping and data conversion.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  By following these steps, you should be able to identify the cause of the CNV_NCE_BAS177 error and implement a solution to resolve it.