Message type: E = Error
Message class:  CNV_DMC_SIN - Messages for s-innovations migration 
Message number: 440
Message text: Sheet/table: &1 with field: &2 = &3 do not exist at a higher level
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Do the following for all the incorrect records found from sheet/table
&V1&:
+,,Check whether there is any typo in sheet/table &V1& for field &V2&.
+,,Check the higher level sheets/tables and add missing records if
required or delete the record from sheet/table &V1&.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_DMC_SIN440 typically occurs during data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that there is a reference to a sheet or table that does not exist at a higher level in the data hierarchy. Here’s a breakdown of the cause, potential solutions, and related information:
Cause: Missing Data Hierarchy: The error suggests that the specified sheet or table (denoted by &1) and the field (denoted by &2) with the value (denoted by &3) cannot be found in the expected higher-level structure. This often happens when the data being migrated is not properly aligned with the expected hierarchy or structure in the target system. Incorrect Mapping: There may be an issue with how the data is mapped from the source to the target system. If the mapping does not correctly reflect the relationships between different data entities, this
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