Soon after the installation of the Freepbx the Queuemetrics includes /var/www/html/admin/modules/core/etc/extensions.conf at the end of the file the following line : #include extensions_queuemetrics.
Soon after the FreePBX reports that one of the core module of the file has changed and sets the same as a Warning .
The problem is when you need to perform the update module "Core" /var/www/html/admin/modules/core/etc/extensions.conf the file is replaced by a new file by removing the line #include extensions_queuemetrics , then immediately if the asterisk is restarted the Queuemetrics stops working .
To solve the problem inserted the line #include in /etc/asterisk/extensions_override_freepbx.conf .
Thus the Queuemetrics returned to work and when there is update the core module will no longer interfere with the functioning of Queuemetrics .