Message type: E = Error
Message class:  CNV_20335_CHECK - Message Class for 20335 Checks 
Message number: 012
Message text: No target provided for source &1. Mapping is not complete
The provided mapping is incomplete. A mapping line contains a source
value (&V1&) but not a target value.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
You have to complete the mapping by providing the requested field values
or by deleting the mapping line which causes the problem.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20335_CHECK012 indicates that there is an issue with the mapping of source and target fields during a data migration or conversion process. Specifically, the error states that no target has been provided for a given source field, which means that the mapping is incomplete.
Cause: Incomplete Mapping: The primary cause of this error is that the source field (indicated by &1) does not have a corresponding target field defined in the mapping configuration.
Configuration Issues: There may be issues in the configuration settings of the data migration tool or the specific mapping rules that have not been set up correctly. Data Model Changes: Changes in the data model (e.g., changes in the source or target structures) that have not been reflected in the mapping configuration can lead to this error. Missing Entries: The mapping table may be missing entries for certain source fields, leading to the absence of a target field.
Solution: Check
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