Getting error while transferring media into voicemail

Hi All,
I am getting the following error while making a call and when the call is unanswered from the other side.

Executing [6001@demo:2] VoiceMail(“SIP/test_phone_2-00000000”, “6001@vm-demo,u”) in new stack
[Nov 12 16:45:13] WARNING[15060]: file.c:666 ast_openstream_full: File vm-theperson does not exist in any format
[Nov 12 16:45:13] WARNING[15060]: file.c:957 ast_streamfile: Unable to open vm-theperson (format 0x2 (gsm)): File exists
== Spawn extension (demo, 6001, 2) exited non-zero on ‘SIP/test_phone_2-00000000’

Any help to resolve this will be highly appreciated.

Have you verified you have your sound files installed?

Look in /var/lib/asterisk/sounds, Your Asterisk instance is attempting to playback a file named vm-theperson.gsm and is unable to.

Actually it is trying to play any file in a supported sound file format to a device that is using GSM. Any format that it can convert to GSM will be used, and you will get a different error if it exists, but only in formats that it can’t convert.

Either you haven’t installed any of the sound files, or you haven’t installed the additional ones.