Message type: E = Error
Message class:  CNV_NCE_BAS - Number conversion engine: messages 
Message number: 177
Message text: Changes in subobject mappings are detected
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.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Execute the activity <ZK>Initialize Mapping Values for Number Range
Objects</> again. The system will update all changed number range
objects.
Error message extract from SAP system. Copyright SAP SE.
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
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