Try this... Under Tools, open Options, then select the "General" tab. Under
Settings, see if R1C1 reference style is checked. If it is, clear it. That
should fix your problem.

Good luck!

"rrgyoung" wrote:

How do I change the column headers back to letters? Formulas will still work
if I use r1c1 format, but why did it change from letter headers on columns?