As I didn't get any answer to my previous question on similar subject, I'll
make a new attempt with somewhat simpler examples.

Let's me have a custom data validation defined for some range of cells. P.e.
I select the range A1:A10 and set custom validation formula as
=AND(A1=0,A1<=100).
Now only entries between 0 and 100 (or empty cell) are allowed. When tested,
data validation works.

Now I define (the range A1:A10 is selected) a named range MyRange
=$A$1:$A$10
, and modify the data validation formula (for cell A1) to
=AND(MyRange=0,MyRange<=100)
Now any entry is allowed.

Maybe it's because I'm looking for particular entry in named range? Let's
try another condition for same range.
=(SUM($A$1:$A$10)<=100)
I can enter numeric entries into range only until their sum doesn't exceed
100 now. It's OK.

But when the validation formula will be
=(SUM(MyRange)<=100)
then I can enter any values, and the sum isn't checked anymore.

When I searched with google for subject, I didn't find any restrictions for
using named ranges in data validation. But it looks like for Custom data
validation such limit exists, and I find this very annoying.

Has somebody any enlighting ideas about subject? Thanks in advance for any
tips.

--
Arvi Laanemets
(When sending e-mail, use address arvil<Attarkon.ee)