Thanks Chuck, that was it
Perhaps I had that in there in my 5.14 code and when I upgraded from 5.14 to 5.20 I missed it in the file compare I run through each time there's an update - other than that, I can't think why it would not of been there.
Thanks again. I'm all set on 5.21 now
Now for
VB 3.50

Naah, I'll save that for next month!