SAP Message UCT8042 - Mapping rule for &1, row &2: Source selection is missing

Diagnosis
The mapping rule for target field &V1& contains a condition or areassignment in row &V2&. No source selection or an empty sourceselection is defined for the operator.

System Response
The settings cannot be saved. The system issues this error message.

Procedure
If the rule contains a condition, add the source fields in the detailsand define the selection criteria.
If the rule contains a reassignment, add the source fields in thedetails and define the selection criteria.