Fatal error: Uncaught mysqli_sql_exception: MySQL server has gone away in /scalar-data/scalar.usc.edu/works/system/database/drivers/mysqli/mysqli_driver.php:180 Stack trace: #0 /scalar-data/scalar.usc.edu/works/system/database/drivers/mysqli/mysqli_driver.php(180): mysqli_query(Object(mysqli), 'UPDATE `scalar_...') #1 /scalar-data/scalar.usc.edu/works/system/database/DB_driver.php(456): CI_DB_mysqli_driver->_execute('UPDATE `scalar_...') #2 /scalar-data/scalar.usc.edu/works/system/database/DB_driver.php(302): CI_DB_driver->simple_query('UPDATE `scalar_...') #3 /scalar-data/scalar.usc.edu/works/system/database/DB_active_rec.php(1305): CI_DB_driver->query('UPDATE `scalar_...') #4 /scalar-data/scalar.usc.edu/works/system/libraries/Session.php(306): CI_DB_active_record->update('scalar_db_sessi...', Array) #5 /scalar-data/scalar.usc.edu/works/system/libraries/Session.php(491): CI_Session->sess_write() #6 /scalar-data/scalar.usc.edu/works/system/application/models/login_model.php(74): CI_Session->set_userdata(Array) #7 /scalar-data/scalar.usc.edu/works/system/application/core/MY_Controller.php(89): Login_model->get() #8 /scalar-data/scalar.usc.edu/works/system/application/core/MY_Controller.php(77): MY_Controller->set_login_params() #9 /scalar-data/scalar.usc.edu/works/system/application/controllers/book.php(48): MY_Controller->__construct() #10 /scalar-data/scalar.usc.edu/works/system/core/CodeIgniter.php(309): Book->__construct() #11 /scalar-data/scalar.usc.edu/works/codeigniter.php(203): require_once('/scalar-data/sc...') #12 {main} thrown in /scalar-data/scalar.usc.edu/works/system/database/drivers/mysqli/mysqli_driver.php on line 180