See also:
- How to diagnose «500 Internal Server Error»
- How to enable the developer mode
- How to see the diagnostic reports in the Google Chrome browser console
- The exceptions are loggged into the
var/log/exception.logfile - The non-exceptional messages are loggged into the
var/log/system.logfile - The debug messages are logged into the
var/log/debug.logfile - How to write a message to a log file?