(07-14-2019, 08:10 PM)Tim Curtis Wrote: To troubleshoot try the following:Hi,
Just to report back: I'm 99% confident it was a permissions issue on the external hard disk.
1. cat /var/log/mpd/log produced nothing on my main Pi connected to USB disk. Connecting to the Pi from the Mac I saw that the file structure of the external hard disk had two shares: for both its current and previous name [I had changed the name of the USB disk from 'Films and Music' to 'Files' earlier, after installing MoOde].
2. Better to start from scratch. New flash of 5.4 Beta 2.
3. Now cat /var/log/mpd/log produces a list of every file on disk. And it looks like a permissions issue.
4. Hard disk back into Mac. Although read and write was enabled for 'everyone', ignore permissions box on disk was ticked. I unticked that and reset permissions for all files for everyone.
5. USB disk back into Pi. All files correctly recorded.
6. I then tried SMB and UPnP from my second and third Pi4s and both seem to work correctly having accessed cat /var/log/mpd/log from both of those Pis too. SMB seems the better option of the two.
Many thanks for your help. All seems very stable now. I had tried cat /var/log/mpd/log before originally posting but was a bit puzzled when I did not see any output. So my intuition is that the main problem was a permissions issue and the secondary problem was the fact that I renamed my external disk from 'Films and Music' to 'Files' but the SMB share of 'Films and Music' was still present.