>I have found statements like:
>
> ? myVariable = ""
>
>to consistently produce unreliable results
>.
>
>I now use with confidence.
>
> ? ISBLANK(myVariable) = .T. / EMPTY(myVariable) = .T.

EXCEPT when you LOCATE FOR EMPTY(myField). Then you will get zero Rushmore optimzation. If you want to determine if a character field is "empty" do LOCATE FOR myfield=SPACE(LEN(myField))