View source for No application 'MYSQL' for extension

If you see such error:

 [2013-08-21 08:55:20] WARNING[10891] pbx.c: No application 'MYSQL' for extension (custom_context_mor, 98745698569586, 1)

Means that app_mysql.so module is required for your configuration.

To install it:

 cd /usr/src/asterisk
 make menuconfig

Go to "Add-ons" and mark "app_mysql". Save changes and exit.

 make install

Do: 
 
 asterisk -vvrx 'module load app_mysql.so'

To check if module is loaded:

 asterisk -vrx 'module show like mysql'