Title: Major Install error
Last modified: August 19, 2016

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# Major Install error

 *  [taiger](https://wordpress.org/support/users/taiger/)
 * (@taiger)
 * [18 years, 1 month ago](https://wordpress.org/support/topic/major-install-error/)
 * Hi,
    I have tried almost every thing to get this upgrade install to work, but
   i keep getting this error message.
 * Fatal error: Cannot redeclare validate_username() (previously declared in /home/……./
   public_html/functions/validate_funct.php:1097) in /home/……./public_html/blog/
   wp-includes/registration.php on line 49
 * Any help would be great.

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

 *  Moderator [Dion Hulse](https://wordpress.org/support/users/dd32/)
 * (@dd32)
 * Meta Developer
 * [18 years, 1 month ago](https://wordpress.org/support/topic/major-install-error/#post-722679)
 * Are you using a non-wordpress authentication method?
 * Whatever the file public_html/functions/validate_funct.php is, its causing a 
   function conflict with WordPress, AFAIK, it’ll need to be updated to support 
   the new authentication methods used by WordPress 2.5
 *  Thread Starter [taiger](https://wordpress.org/support/users/taiger/)
 * (@taiger)
 * [18 years, 1 month ago](https://wordpress.org/support/topic/major-install-error/#post-722706)
 * Hi, and thanks for getting back to me. I had this problem the lasttime that I
   upgraded, and I actually managed to get 2.5 working, but I could not get it to
   put back my past posts, so silly me I thought may be I should try to reinstall
   it. So here we are, problems with new install.
 * Does anyone else have shuch a problem, or a fix for this.
 * regards Taiger
 *  Thread Starter [taiger](https://wordpress.org/support/users/taiger/)
 * (@taiger)
 * [18 years, 1 month ago](https://wordpress.org/support/topic/major-install-error/#post-722795)
 * Hi, i am pulling my hair out with this one. I still can not get this installed
   and can not go back to v2.3.3. the error message does not make sense.
 * Fatal error: Cannot redeclare validate_username() (previously declared in /home/……../
   public_html/functions/validate_funct.php:1097) in /home/……../public_html/blog/
   wp-includes/registration.php on line 21
 * i had it working ish, but it did not load the past blogs.
 * Please please help

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

The topic ‘Major Install error’ is closed to new replies.

 * In: [Installing WordPress](https://wordpress.org/support/forum/installation/)
 * 3 replies
 * 2 participants
 * Last reply from: [taiger](https://wordpress.org/support/users/taiger/)
 * Last activity: [18 years, 1 month ago](https://wordpress.org/support/topic/major-install-error/#post-722795)
 * Status: not resolved

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