Title: [Plugin: Advanced Custom Fields] acf.data is undefined
Last modified: August 20, 2016

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# [Plugin: Advanced Custom Fields] acf.data is undefined

 *  Resolved [NicolaSpreafico](https://wordpress.org/support/users/nicolaspreafico/)
 * (@nicolaspreafico)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/plugin-advanced-custom-fields-acfdata-is-undefined/)
 * I’m using WP3.4
 * When i open a page or post editor i get this JS error
 *     ```
       acf.data is undefined
       /wp-content/plugins/advanced-custom-fields/js/input-ajax.js?ver=3.2.5
       Line 145
       ```
   
 * [http://wordpress.org/extend/plugins/advanced-custom-fields/](http://wordpress.org/extend/plugins/advanced-custom-fields/)

Viewing 4 replies - 1 through 4 (of 4 total)

 *  [Endolil](https://wordpress.org/support/users/zabdesign/)
 * (@zabdesign)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/plugin-advanced-custom-fields-acfdata-is-undefined/#post-2844980)
 * I am having the same issue.
    It is pretty annoying because the error prevents
   important jQuery functions of the WordPress backend from loading properly. Under
   this circumstances ACF is useless.
 * Any hints or a bug fix is really appreciated.
 *  [Endolil](https://wordpress.org/support/users/zabdesign/)
 * (@zabdesign)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/plugin-advanced-custom-fields-acfdata-is-undefined/#post-2844981)
 * What works for me is to use an older version (3.1.4) of ACF
    That is not really
   a solution but a work around so that I can use acf for the WP 3.4 based site 
   I am working on.
 *  Thread Starter [NicolaSpreafico](https://wordpress.org/support/users/nicolaspreafico/)
 * (@nicolaspreafico)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/plugin-advanced-custom-fields-acfdata-is-undefined/#post-2844982)
 * Same issue, with jquery crashed i can’t use other plugin tools in the page/post
   editor and also the sub-menus in the left sidebar are disabled.
 * I’ve tried EVERY versione from 3.2.5 to 3.1.4 (included 3.1.4) but i have the
   same error
 *  Thread Starter [NicolaSpreafico](https://wordpress.org/support/users/nicolaspreafico/)
 * (@nicolaspreafico)
 * [13 years, 11 months ago](https://wordpress.org/support/topic/plugin-advanced-custom-fields-acfdata-is-undefined/#post-2844983)
 * SOLVED: [http://www.advancedcustomfields.com/support/discussion/comment/4311#Comment_4311](http://www.advancedcustomfields.com/support/discussion/comment/4311#Comment_4311)

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘[Plugin: Advanced Custom Fields] acf.data is undefined’ is closed to 
new replies.

 * ![](https://ps.w.org/advanced-custom-fields/assets/icon.svg?rev=3207824)
 * [Advanced Custom Fields (ACF®)](https://wordpress.org/plugins/advanced-custom-fields/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/advanced-custom-fields/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/advanced-custom-fields/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/advanced-custom-fields/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/advanced-custom-fields/reviews/)

 * 4 replies
 * 2 participants
 * Last reply from: [NicolaSpreafico](https://wordpress.org/support/users/nicolaspreafico/)
 * Last activity: [13 years, 11 months ago](https://wordpress.org/support/topic/plugin-advanced-custom-fields-acfdata-is-undefined/#post-2844983)
 * Status: resolved