Greetings!

Sorry. I have not been online as much lately. With the 21000 tracks, the interesting question is not the number of tracks - it is the number of playlists. I have never had trouble loading huge numbers of MP3 files, but I can and will crash the sync every time when trying to upload a large quantity of playlists at the same time. I suspect that the playlists are handled differently from regular files, and that there is a fixed memory limitation (variable initialization?, structure size?) that is getting overflowed with too many playlists.

When it locks up with emplode, is it during the playlist phase of the upload, or during individual MP3 files?