Because @ is not used in a formula in Excel. Just use

=SUM(A1:A2)

--
HTH

Bob Phillips

(remove nothere from email address if mailing direct)

"Sarah_Lecturer" wrote in message
...
Hi

I cannot understand why this happens
A
1 1
2 5
3 =@sum(A1:A2)

When I press Enter, a new email message opens, why?

Thanks