Title: Callback Error
Last modified: August 19, 2016

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# Callback Error

 *  [patdryburgh](https://wordpress.org/support/users/patdryburgh/)
 * (@patdryburgh)
 * [16 years, 12 months ago](https://wordpress.org/support/topic/callback-error/)
 * Hello,
    I am developing a theme that includes an options page. When I activate
   the theme, the following error comes up above the dashboard:
 * > Warning: call_user_func_array() [function.call-user-func-array]: First argument
   > is expected to be a valid callback, ‘mytheme_add_admin’ was given in /home/
   > themedir/public_html/wptest/wp-includes/plugin.php on line 339
 * The theme works on the localhost server I created it on, but as soon as I upload
   to another wordpress installation, it breaks down.
 * Any advice is much appreciated!

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [jeffsmith-1](https://wordpress.org/support/users/jeffsmith-1/)
 * (@jeffsmith-1)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/callback-error/#post-1046765)
 * Which action is ‘mytheme_add_admin’ added to? Am I correct in assuming that the
   mytheme_add_admin function is in your theme’s functions.php file?
 * What version of WordPress do you have installed on your local box, and what version
   is installed on the other server?
 *  [amymahon](https://wordpress.org/support/users/amymahon/)
 * (@amymahon)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/callback-error/#post-1046776)
 * Pat, I have no idea. But here I am giving you my moral support 🙂

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Callback Error’ is closed to new replies.

## Tags

 * [callback](https://wordpress.org/support/topic-tag/callback/)

 * 2 replies
 * 3 participants
 * Last reply from: [amymahon](https://wordpress.org/support/users/amymahon/)
 * Last activity: [16 years, 11 months ago](https://wordpress.org/support/topic/callback-error/#post-1046776)
 * Status: not resolved

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