Local library not indexing correctly since updating desktop app from version 16.6 to 16.7

Hello ​@SWeaver01, welcome back!

I am sorry to hear you are having trouble re-indexing your Music Library on your Sonos System after a recent update.

The error message you shared indicates a problem with your Sonos connecting to your Music Library host device. If you’ve not tried yet, I would suggest a reboot to that device.

If you are still experiencing trouble indexing your Music Library, I would recommend you to reach out to our Support Team for some live troubleshooting.

They have tools at their disposal to provide you with information and advice specific to your system and what it reports.

I hope this helps.

Thank you ​@Sotiris C.

I just tried that and unfortunately it didn’t work.

I am so tired of problems with the S2 app that I am thinking of moving back to the S1 app.  All my Sonos speakers are older and S1 compatible.  Do you think I will still have problems adding my local music library if I revert to S1?

This may not be your issue but I have encountered this problem after a power failure or if I reboot my NAS and Router (typically something I do at the same time).

What appears to happen is that the router starts up much more slowly than the NAS so when the NAS wakes there is nothing for it to talk to and establish DNS / IP settings (unless you run with a static IP).

I then get the symptoms you describe within Sonos.

Now you would expect that when the router eventually does wake up everything would settle down but that is not what happens with my router / NAS / Sonos combination. 

To overcome this I always start the router first and wait for it to fully start and then power up the NAS.

This seems to overcome the “no longer available” problem within Sonos. 

Another solution is to simply delete and re-add the music library link but that takes a while as it has to re index everything and you have to re-establish the credentials.   

Thank you.  I just gave up on the S2 app and “downgraded” all my speakers so I can use the S1 app.  Soon as I did that my music library loaded up without a hitch.  S2 isn’t worth the aggravation, especially since I primarily use Sonos to listen to my large CD collection that I ripped to iTunes.