SS-1
=INDEX({MPP Range 2}, MATCH([System Number]@row, {MPP Range 1}, 0), 2)
i have gone int Range1 or 2 and the columns for MPP and the columns are the same as SS-1.
deleted all formulas referencing MPP.
i have deleted MPP sheet the recreated it from scratch.
re-created the formula from scratch.
selected to go to Range 1 and the columns did not change.
any idea what to look for?