errmsgdest 3
This key defines where the error messages are sent. By default error messages are sent to nowhere. This key may have four different values:
Switching off all error messages may harden to find out what goes wrong, therefore it is not advisable to set this configuration value zero. The error log file is a good place for error messages. Sending error messages to the client browser may be convenient during development but may present security risk on a production server.