Cannot get window title to display in frameset

I have a frameset with 3 frames. Top, bottom-left and bottom-right

through the use of an embedded view in the top frame, a variety of different document types are displayed in one of the bottom frames.

The correct Window title appears for the frameset for every type of document opened in either of the 2 bottom frames, but I cannot get the title of the top document to appear at all.

I have tried setting the top frame as default focus.

The frameset has no title of its own.

I have checked the formula for the window title of the top document, and have set it to just “Test”

The only difference that I can think of is that the top frame document (the header document) launches the frameset itself, and the other documents are opened after the frameset has already opened. Either way, even switching focus back to the top frame doesn’t change the window title - it will just stay with the last title displayed from wither of the other 2 frames.

any clues?

TIA