What error message do you get?

Pete

On Jun 3, 5:01*pm, BG Mark wrote:
I am trying to enter a vlookup function into a cell to look at data in
another work book, but after entering the initial lookup reference followed
by the comma, I get an error message when I try to move to the look up range
in the other work book. *It may be some setting within the work book but i
cannot figure out what. *I have used vlookup on many occasions and have never
seen this type of error before.