Apply OS : Windows, Mac, Linux, iOS
Apply Navicat Product : Navicat for MySQL, Navicat for MariaDB, Navicat Premium
Apply Navicat Version No. : All
The most common reason for the MySQL server has gone away error is that the server timed out and closed the connection.
For more details on this error, please refer to MySQL Manual - http://dev.mysql.com/doc/refman/5.5/en/gone-away.html