Search highest numbers in a row

I can't save my excel worksheet it there is failure in the formula.
I slightly adjusted the formula into this:
=IFERROR(INDEX(33:33(IF($B$33:$CLW$33>20;COLUMN($B$33:$CLW$33));ROWS($P35:$P38))),"")
I changed the columns into semi-columns and changed $1:1 into $P35:$P38. When I commit this I get the notification that there aren't enough arguments for this formula.
The workbook in which I tried it is still the same as the one I uploaded

Grtz

I've put the formula in cell P35 of the file you attached to Post #5, and then copied it down.

Hope this helps.

Pete