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), 'SELECT `version...') #1 /scalar-data/scalar.usc.edu/works/system/database/DB_driver.php(456): CI_DB_mysqli_driver->_execute('SELECT `version...') #2 /scalar-data/scalar.usc.edu/works/system/database/DB_driver.php(302): CI_DB_driver->simple_query('SELECT `version...') #3 /scalar-data/scalar.usc.edu/works/system/database/DB_active_rec.php(964): CI_DB_driver->query('SELECT `version...') #4 /scalar-data/scalar.usc.edu/works/system/application/core/MY_Model.php(395): CI_DB_active_record->get() #5 /scalar-data/scalar.usc.edu/works/system/application/models/book_model.php(385): MY_Model->is_top_version('1072052', '11') #6 /scalar-data/scalar.usc.edu/works/system/application/controllers/book.php(78): Book_model->get_book_versions('39036', true) #7 /scalar-data/scalar.usc.edu/works/system/core/CodeIgniter.php(309): Book->__construct() #8 /scalar-data/scalar.usc.edu/works/codeigniter.php(203): require_once('/scalar-data/sc...') #9 {main} thrown in /scalar-data/scalar.usc.edu/works/system/database/drivers/mysqli/mysqli_driver.php on line 180