Four digit tracknumber disables group tag functionality?

[simoncn]

(05-10-2013 17:48)Dieter Stockert Wrote:  Well, there may be no existing album with as many tracks, but it could be someday (lets me think of an audio book of Robert Musil's 'Man without Qualities' and the like). So why the restriction?

This restriction is required for resource/performance reasons. There is a similar restriction of a maximum of 63 discs in a multidisc album.