-- Executing BackGround("SIP/9136744395-d412", "vm-tempgreeting") in new stack
    -- Playing 'vm-tempgreeting' (language 'en')
Feb 25 03:55:29 WARNING[3586]: file.c:584 ast_readaudio_callback: Failed to write frame
  == Spawn extension (incoming, 19136744395, 1) exited non-zero on 'SIP/9136744395-d412'