Title: [Plugin: WordPress Automatic upgrade] Upgrade failed
Last modified: August 19, 2016

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# [Plugin: WordPress Automatic upgrade] Upgrade failed

 *  Resolved [fest](https://wordpress.org/support/users/fest/)
 * (@fest)
 * [17 years, 9 months ago](https://wordpress.org/support/topic/plugin-wordpress-automatic-upgrade-upgrade-failed/)
 * I tried upgrading 2.3.1 to 2.6 using this automatic tool. At first, I skipped
   steps 1 and 2 because I tried to upgrade my backup version of WP. Then it failed
   on downloading latest version (because the folder wpau-backup in the root of 
   my site was non-existant.
    Then I created that folder and tried again- this time
   the update was successful, but the site didn’t work after upgrade. Instead, I
   just saw a bunch of PHP notice’s about the use of undefined constant- COOKIEHASH.
   I started the upgrade from scratch, but this time I set WP_DEBUG to false in 
   my wp-config.php. After this, everything succeeded. Well, my themes need to be
   tweaked but everything works so far.
 * [http://wordpress.org/extend/plugins/wordpress-automatic-upgrade/](http://wordpress.org/extend/plugins/wordpress-automatic-upgrade/)

The topic ‘[Plugin: WordPress Automatic upgrade] Upgrade failed’ is closed to new
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 * 0 replies
 * 1 participant
 * Last reply from: [fest](https://wordpress.org/support/users/fest/)
 * Last activity: [17 years, 9 months ago](https://wordpress.org/support/topic/plugin-wordpress-automatic-upgrade-upgrade-failed/)
 * Status: resolved

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