Scenario, both udf's are in the SO_Header, new udf_prod (date field) that I am trying to update from an existing date field udf_allocated that is populated through a VI import.  I am trying to save a manual step of entering the date in udf_prod by sourcing from the udf_allocated, however, sometimes we might need to populate the udf_prod with a date and the VI import of the udf_allocated might not have a value.  In theory I am thinking the VI import of a blank udf_allocated would clear my udf_prod, so how could I avoid this, scripting or any other ideas?