Welllll ---

It appears that the two pages that were added automatically when the PageFrame was created are named "Page1" and "Page2", and cannot be changed. That is what I was referring to, not having inspected the third page ....

I added the third page myself, and it does allow me to change the name.

So, it appears that if I had deleted the original pages, then added them back in myself, I would have been OK.

Thanks