When you add a network share or you have made changes to your Local Library and selected Reindex Music Collection or Rebuild Index, the changes are not reflected or your Bluesound Player restarts.
This can be caused by a metadata tag that is unreadable or a music file having no tags at all.
The question is how to find the one file that is missing in a library of 40,000 songs.
First open the BluOS app and go to Help > Diagnostics and locate the IP Address of your Player (i.e. 192.168.1.101).
On a PC, Tablet or Smartphone on the same network as your Bluesound Players, open a local web browser such as Safari, or Chrome and enter the following command where 192.168.1.101 is the IP Address you located. Please type it exactly as written, as BluOS commands are case sensitive.
Once the index is complete or the Player reboots and returns to service, select Help > Diagnostics > More to locate the Bluesound Player's Log file. Scroll through the lengthy log and locate the list of files indexing (see sample output below).
Oct 31 16:20:42 (none) user.info ./ms.pl: main::__ANON__ ./ms.pl (1316) Scanning file /var/mnt/Music/Minus the Bear/Highly Refined Pirates/Sprintz!!!Sprintz!!!.mp3
Oct 31 16:20:42 (none) user.info ./ms.pl: main::__ANON__ ./ms.pl (1316) Scanning file /var/mnt/Music/Minus the Bear/Highly Refined Pirates/Woman We Haven't Met Yet.mp3
Oct 31 16:20:42 (none) user.err ./ms.pl: main::__ANON__ ./ms.pl (1337) reindex failed
Note the last file scanned before the index failed. In the above case it is located in the Music folder on the NAS and is one of the files in the album Highly Refined Pirates by Minus the Bear.
Temporarily remove these files from your Library and Reindex normally. If the index continues to fail, follow these step again as there may be more than one effected album or folder.
Review the Metadata Tags of all the files in this folder cleaning up errors. Once resolved, return these files to your Library and Reindex again normally.
If you are unfamiliar with Metadata Tags, please see BLS-KB13-916 Why is my Music not sorted correctly after Bluesound Indexed my music.