Title: Fatal error call to undefined function format_size Last modified: August 30, 2016 --- # Fatal error call to undefined function format_size * Resolved [lakenjr](https://wordpress.org/support/users/lakenjr/) * (@lakenjr) * [10 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-format_size/) * Lovely plugin – nice and simple to use. Thank you. * Unfortunately I have encountered a problem with version 2.4 of the plugin. * When I try to run “create new database backup” I just see a white screen (after a couple of seconds). * Database information > Tables information shows the following error message. * **Fatal error: Call to undefined function format_size()** in ………./public_html/ jetlagandmayhem/wp-content/plugins/wp-database-backup/includes/admin/class-wpdb- admin.php on line 406 * ==================================== PHP version 5.3.29 MySQL version 5.5.42- 37.1 Graphene theme I also have the plugin BackWpUp installed (I believe in multiple backups – also your plugin offers the fastest/easiest way to restore a saved database after a problem). * website is [http://www.jetlagandmayhem.com](http://www.jetlagandmayhem.com) * [https://wordpress.org/plugins/wp-database-backup/](https://wordpress.org/plugins/wp-database-backup/) Viewing 7 replies - 1 through 7 (of 7 total) * [Prashant Walke](https://wordpress.org/support/users/walkeprashant/) * (@walkeprashant) * [10 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-format_size/#post-6227814) * Hi, * Thanks for your kind of words. * We have resolved this issue in v.3.0. * Please update plugin and let me know in case any issue. * Thread Starter [lakenjr](https://wordpress.org/support/users/lakenjr/) * (@lakenjr) * [10 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-format_size/#post-6227866) * I still have a problem and am **unable to create backups with this plugin on one of my websites**. “When I try to run “create new database backup” I just see a white screen (after a couple of seconds).” * Database information > Tables information now shows the tables – so the **fatal error problem has been resolved**. * Using wordpress 4.2.2 and Version 3.1 of WP Database Backup (I deleted old version and did a clean install) * website [http://www.jetlagandmayhem.com](http://www.jetlagandmayhem.com) – backups do NOT WORK website [http://www.papamayhem.com](http://www.papamayhem.com) – backups DO WORK PROPERLY * Thread Starter [lakenjr](https://wordpress.org/support/users/lakenjr/) * (@lakenjr) * [10 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-format_size/#post-6227879) * I have emailed the details as requested * [Prashant Walke](https://wordpress.org/support/users/walkeprashant/) * (@walkeprashant) * [10 years, 9 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-format_size/#post-6227890) * Hi, * We have resolved format_size issue in latest WP Database backup plugin. * Please install latest plugin and let me know in case issue. * Happy to help! * Thread Starter [lakenjr](https://wordpress.org/support/users/lakenjr/) * (@lakenjr) * [10 years, 9 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-format_size/#post-6227891) * Thanks for help so far. Unfortunately, I still have “the white screen problem” and am unable to create backups with this plugin on one of my websites. * **When I try to run “create new database backup” I just see a white screen (after a couple of seconds).** * Using wordpress 4.2.3 and Version 3.2 of WP Database Backup (I deleted old version of the plugin and did a clean install) * website [http://www.jetlagandmayhem.com](http://www.jetlagandmayhem.com) – backups do NOT WORK website [http://www.papamayhem.com](http://www.papamayhem.com) – backups DO WORK PROPERLY * Thread Starter [lakenjr](https://wordpress.org/support/users/lakenjr/) * (@lakenjr) * [10 years, 9 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-format_size/#post-6227895) * Thanks for the interest you are taking in resolving this. **Is there any way that you can display a progress indicator in place of the white screen?** * You are probably right to suspect database size as the problem.. However I did wait for 5 minutes before abandoning. My website [http://www.papamayhem.com](http://www.papamayhem.com)–( backups DO WORK PROPERLY) has a **database size of 64mb** * My website [http://www.jetlagandmayhem.com](http://www.jetlagandmayhem.com) –( backups do NOT WORK) has a **database size of 176mb** (which I assume is not huge for an operational site). * ——————————————————— I have emailed the admin detail to Prashant. As a user of a shared hosting service, I dont think I am able to change htaccess OR php.ini execution limits. * I dont want to ask the hosting service to increase execution time. That is not required for anything else that I do – whatever limit is “in force” protects me against runaway jobs – so I dont want to increase that. * I did change wp-config.php as suggested – but that did not help. * error_log does not contain anything for this time. * [Prashant Walke](https://wordpress.org/support/users/walkeprashant/) * (@walkeprashant) * [10 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-format_size/#post-6227920) * Hope you are doing well. * Let me know in case any issue. Viewing 7 replies - 1 through 7 (of 7 total) The topic ‘Fatal error call to undefined function format_size’ is closed to new replies. * ![](https://ps.w.org/wp-database-backup/assets/icon-256x256.png?rev=2838048) * [WP Database Backup - Unlimited Database & Files Backup by Backup for WP](https://wordpress.org/plugins/wp-database-backup/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-database-backup/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-database-backup/) * [Active Topics](https://wordpress.org/support/plugin/wp-database-backup/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-database-backup/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-database-backup/reviews/) * 7 replies * 2 participants * Last reply from: [Prashant Walke](https://wordpress.org/support/users/walkeprashant/) * Last activity: [10 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-call-to-undefined-function-format_size/#post-6227920) * Status: resolved