=IF(Result@row = "", "", IF(Result@row > DATE(TODAY(-30)), "New", IF(Result@row > DATE(TODAY(-60)), "Developing", IF(Result@row > DATE(TODAY(-90)), "Contributing", "Experienced"))))
That is my formula and the Result@row field has Date in it on one row it is giving me an #INCORRECT ARGUMENT SET error. On another row it is giving me an #INVALID OPERATION error.
Both of the results cells being referenced have a different formula that returns a date. I have the column set to Date only restriction and the sheet they are referencing to get the date is also set to Date only columns.