Thank you macropod, my second email is still searching for a simple answer to the problem of displaying the age of a person in years, months and days, when the DOB and todays date are known. It is interesting how volatile written communication may be, so easy to have misunderstandings if the presenter, in this case myself, assumes that the listener understands my writing.
I must have done something wrong testing the DATEDIF formula first time, it works now. many Thanks