It would help if you described your data layout - in your first post you said you had 10,000 rows!
With my formula you are counting the number of rows in the range and subtracting from that the rows that have all three cells blank, so applying my formula to the ranges that OnError has used, you would have this:
=ROWS(A7:A32)-SUMPRODUCT((I7:I32="")*(J7:J32="")*(K7:K32="")) + ROWS(A36:A80)-SUMPRODUCT((I36:I80="")*(J36:J80="")*(K36:K80="")) + ROWS(A84:A109)-SUMPRODUCT((I84:I109="")*(J84:J109="")*(K84:K109=""))
Hope this helps.
Pete
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