The message you get is due to two main reasons:
1, the update is indeed still in progress
2. some error occurred (while parsing the files - bad metadata / access rights / corrupted file)
So, in case of 2, you can investigate the MPD log file ( /var/log/mpd/log ) to see the last successfully parsed file... the following one is somehow breaking things up)
P.S.
The total number of tracks will be available once the library scan completes successfully.
1, the update is indeed still in progress
2. some error occurred (while parsing the files - bad metadata / access rights / corrupted file)
So, in case of 2, you can investigate the MPD log file ( /var/log/mpd/log ) to see the last successfully parsed file... the following one is somehow breaking things up)
P.S.
The total number of tracks will be available once the library scan completes successfully.