Can some please explain the reason for the error? I don't understand what is wrong with what I have typed.
=SUMIFS({STD HOURS}, {STATUS}, ="*** COMPLETE ***", {COMPLETION DATE}, AND(IFERROR(WEEKNUMBER(@cell), 0) = [Week #]@row, IFERROR(YEAR(@cell), 0) = {YEAR SELECTED}))
{STD HOURS} is a column with a formula that returns a number but sometimes returns a blank cell.
{STATUS} is simply a dropdown text column.
{COMPLETION DATE} is a column with only dates or blank cells.
{YEAR SELECTED} is a single cell reference containing a number.
[Week #]@row is a primary column containing a number.