It might be the NG wrap-around. Try this version

=SUM(IF((TODAY()A1:INDEX(A:A,MAX(IF(ISBLANK(G1:G6 5535),0,ROW(G1:G65535))))
+28)*(G1:INDEX(G:G,MAX(IF(ISBLANK(G1:G65535),0,ROW (G1:G65535))))=""),1))

still array entered

--
HTH

Bob Phillips

(replace somewhere in email address with gmail if mailing direct)

"luvthavodka" wrote in message
...
Thanks Bob, but i'm getting a #VALUE return with this. Have committed with
Ctrl-Shift-Enter...is there anything else I could have done wrong?

Regards

Jenny

"Bob Phillips" wrote:


=SUM(IF((TODAY()A1:INDEX(A:A,MAX(IF(ISBLANK(G1:G6 5535),0,ROW(G1:G65535))))+
28)*
(G1:INDEX(G:G,MAX(IF(ISBLANK(G1:G65535),0,ROW(G1:G 65535))))=""),1))

which is an array formula, it should be committed with Ctrl-Shift-Enter,
not
just Enter.

--
HTH

Bob Phillips

(replace somewhere in email address with googlemail if mailing direct)

"luvthavodka" wrote in message
...
I'm looking to count the number of blank cells in column G (only upto
the
bottom of the data table I'm using - the length of which is unknown
until
the
end of the month, but only if the corresponding cell in column A (a
date)
is
greater than 28 days old. What formula should I use?