Next...

I created a very small Master Playlist File (1 line) that just pointed to the large playlist file that was a problem as the MPF. Re-booted the Receiver and unsurprisingly it loaded this first little playlist no bother, but it then worked perfectly when I selected the only option and it loaded the big one.

So, it would appear that this problem relates to the first playlist the Receiver accesses after first (cold) booting. This HAS to below a size limit, thereafter it can handle any larger playlist, but the first one is limited in size (although you can make it larger after the first successful access).

My guess is this has to be a player software issue, so with a re-structuring of the playlists I think I can avoid it. But worth knowing it is there.

Any comments on my analysis?

Anyone able to try a large playlist and see if they get the problem, even with ARM on Windows?