Hi Lloyd,
Yes, I'm using 2020 and I didn't realise the difference in selecting Save As using the 'floppy' icon from the other methods. It's just another annoying little facet of the way this product has grown over the years I suppose.

But anyway, I did try your procedure again and it still failed to synchronise. All my tracks are RealTracks. Like I said, I have no doubt this may work for you and others but it doesn't work in my case. Furthermore, any process that relies on such a 'trick' is definitely to be avoided.

I love BB but and its easy to forgive most of the little software glitches, but when it gets to a point where it wastes such a lot of time then the 'glitches' can get very annoying.
I mean, even with this little procedure that you have outlined, sometimes the dialog disappears during the render - but not every time, only to be found afterwards behind the main screen, or having to Alt - Tab it to try and get it to appear.

So, I'll move on now and forget this, life's a bit too short to stuff a mushroom at my age lol. I could probably try and use Applian's Video Capture to do the job.

Thanks for the information though.

Jonel