Title: Upgrade DB Error
Last modified: August 19, 2016

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# Upgrade DB Error

 *  Resolved [wp0](https://wordpress.org/support/users/wp0/)
 * (@wp0)
 * [15 years, 9 months ago](https://wordpress.org/support/topic/upgrade-db-error/)
 * I’ve upgraded the WP to 3. But then i can’t login admin panel.
 * When i push the upgrade database button from /wp-admin, it was giving this error:
 * Fatal error: Call to undefined method wpdb::tables()
    in /home/account/public_html/
   wp-admin/includes/upgrade.php on line 1403
 * And admin panel page doesn’t open for that.

Viewing 3 replies - 1 through 3 (of 3 total)

 *  [Peter Westwood](https://wordpress.org/support/users/westi/)
 * (@westi)
 * [15 years, 9 months ago](https://wordpress.org/support/topic/upgrade-db-error/#post-1608214)
 * Are you running a drop in alternative database class?
    (could be a caching plugin
   also)
 * Look for a file called db.php in wp-content.
 * If so you need to get an updated version of that which is compatible with WordPress
   3.0.1 before upgrading.
 * See this thread for more info: [http://wordpress.org/support/topic/upgade-php-fatal-error-call-to-undefined-method-wpdbtables-in-upgradephp](http://wordpress.org/support/topic/upgade-php-fatal-error-call-to-undefined-method-wpdbtables-in-upgradephp)
 *  Thread Starter [wp0](https://wordpress.org/support/users/wp0/)
 * (@wp0)
 * [15 years, 9 months ago](https://wordpress.org/support/topic/upgrade-db-error/#post-1608222)
 * It was a caching plugin. And the problem is fixed. Thank you very much!
 *  [Peter Westwood](https://wordpress.org/support/users/westi/)
 * (@westi)
 * [15 years, 9 months ago](https://wordpress.org/support/topic/upgrade-db-error/#post-1608224)
 * Glad to be of assistance

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Upgrade DB Error’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 3 replies
 * 2 participants
 * Last reply from: [Peter Westwood](https://wordpress.org/support/users/westi/)
 * Last activity: [15 years, 9 months ago](https://wordpress.org/support/topic/upgrade-db-error/#post-1608224)
 * Status: resolved

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