File not being scanned.

[Budgie]

Hi, I have a strange problem with a file which is apparently not scanned by minimserver.

I have a directory on my Qnap NAS with .m4a audio files of operas from BBC Afternoon on 3.

These can all be seen using remote file manager and played remotely on PC using VLC etc. Most may be played on Linn devices using control point but one file (so far) is not displayed when I use control point on phone. (BubbleDS 1.7.2.1 on Samsung SIII).

I am just starting to research this issue more deeply but does anybody have any thoughts as to why one file in particular cannot be seen?
Budgie