[Asterisk-Users] Voicemail error message

[Bill]

    I've been working on my voicemail server and recently starting getting
this message. Other than change the server name itself I've been making
modifications to the extensions.conf file but everything still functions
properly. Any idea what this is? I've looked at the app_queue.c file but I
didn't get anything out of it.

    -- Playing 'vm-isunavail' (language 'en')
    -- Playing 'vm-intro' (language 'en')
    -- Playing 'beep' (language 'en')
    -- Recording the message
    -- x=0, open writing:
/var/spool/asterisk/voicemail/default/xxxxxxxxxx/INBOX/msg0000 format:
wav49, 0x87548c0
    -- x=1, open writing:
/var/spool/asterisk/voicemail/default/xxxxxxxxxx/INBOX/msg0000 format: wav,
0x8755088
    -- User ended message by pressing #
    -- Playing 'auth-thankyou' (language 'en')
Dec 15 09:59:04 WARNING[2509]: app_queue.c:340 changethread: Can't change
device with no technology!
Dec 15 09:59:04 WARNING[2509]: app_queue.c:340 changethread: Can't change
device with no technology!
Dec 15 09:59:04 WARNING[2509]: app_queue.c:340 changethread: Can't change
device with no technology!
    -- Executing Hangup("SIP/vci.net-0874c210", "") in new stack
  == Spawn extension (from-sip, 8500, 107) exited non-zero on
'SIP/vci.net-0874c210'

      Bill