=IF(ISBLANK([Supervisor]@row), INDEX({Staff Database Primary Supervisor}, MATCH([Staff]@row, {_Staff Database Range 2}), 0), INDEX({Staff Database Email}, MATCH([Supervisor]@row, {_Staff Database Range 2}), 0)
I am trying to index a Supervisor email from one sheet to another by matching the Staff name, however if no staff matches I want to index the staff email by matching a submitted name to the staff name. I keep getting an #INCORRECT ARGUMENT SET