Hi,
I look from your post that the file is located on:
astra:~ # find /var/spool/asterisk/monitor/ -name '*1247813990.28938*'
/var/spool/asterisk/monitor/2009/6/q6-1247813990.28938.wav
but your configuration key is:
default.monitored_calls=/var/spool/asterisk/%YY/%QU/
I think the correct value should be something like:
default.monitored_calls=/var/spool/asterisk/monitor/%YY/%QU/
Please, remember to restart your QueueMetrics instance for each modification you made on the configuration file.
Let me know if this solves the problem
Thank you and regards,
Marco Signorini