Hi
Im not sure if anyone is going to be able to answer this without seeing your spreadsheet. Each (or each pair) of the bracketed expressions will return TRUE (1) or FALSE (0) and I trust you realise that because your multiplying them all, every expression must be TRUE or the final value returned will be a zero. The most likely thing is you have space characters in one or more cells.
If the function is available on your version of Excel, you could try the Evaluate Formula option and look for a FALSE for one of the expressions. Failing that:
(1) Split the ranges into 2 groups (a) = "" and (b) = $fx$13.
(2) For a) Set a COUNTIF for each column and row (cells <> ""). This should pinpoint any such cells by intersection
(3) For b) You can probably check these manually.
(2) split the expressions into individual cells and see which give a FALSE.
HTH
Bookmarks