SAP Message UCT8209 - Source data format for field &1 is incompatible

Diagnosis
The Conversion Exit indicator is not selected in the mapping rulefor field &V1&. Hence, the system interprets the source key figure as asource value in SAP-internal format and continues processing it.However, while moving the source key figure to target key figure &V1&, t
he system discovered that the format of the source value is incompatiblewith the target format.

System Response
The system will not perform the move for field &V1&.

Procedure
Select the Conversion Exit indicator for field &V1& and executethe method again.