Thanks, defining both areas works fine... the sample in the help file is not
correct..
--
charlie


"Bernard Liengme" wrote:

Surely in your formula you have only one area: A1:C11
For two areas you need something like INDEX((A1:B11, C1:C11),0,3,1))...
Your formula correctly summed column C for me
best wishes
--
Bernard V Liengme
Microsoft Excel MVP
http://people.stfx.ca/bliengme
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"charlie" wrote in message
...
The example in HELP for Index shows the following:
=Sum(Index(A1:C11,0,3,1))... The sum actually adds up both area 1 and 2
and
not just column 3, area 1. What is the proper format to add up just column
3,
area 1?
--
charlie