Audio Chooser + Voicemail

[c20xh2]

Vicidial cluster :
VERSION: 2.14-626a
BUILD: 170825-1708

Is there an option to select a file from the audio store and use it as the voicemail unavailable message ? I tried to overwrite the unavail.wav directly in /var/spool/asterisk/voicemail/default/9895 but I get :

Dec 14 10:01:53] WARNING[57188][C-00008cf3]: format_wav_gsm.c:135 check_header: Unexpected header size 16
[Dec 14 10:01:53] WARNING[57188][C-00008cf3]: file.c:399 fn_wrapper: Unable to open format wav49
[Dec 14 10:01:53] WARNING[57188][C-00008cf3]: format_wav_gsm.c:135 check_header: Unexpected header size 16
[Dec 14 10:01:53] WARNING[57188][C-00008cf3]: file.c:399 fn_wrapper: Unable to open format wav49
[Dec 14 10:01:53] WARNING[57188][C-00008cf3]: file.c:1017 ast_streamfile: Unable to open /var/spool/asterisk/voicemail/default/9895/unavail (format (gsm)): No such file or directory

My audio files are in wave and work correctly if I use them from the audio store to a callmenu.

Thanks !

[c20xh2]

I converted my .wav in .gsm, change the name to unavail.gsm and uploaded it directly in /var/spool/asterisk/voicemail/default/[VOICEMAIL BOX]/.

Everything works, yeah !

Still curious if it's possible to upload it using the web server, am I missing an options somewhere ?