Title: Fatal Error
Last modified: August 30, 2016

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# Fatal Error

 *  Resolved [JenniMcKay](https://wordpress.org/support/users/jennimckay/)
 * (@jennimckay)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-1681/)
 * I am trying to figure out if this plugin will work for a project I’m working 
   on for a client. I started plugging in a few questions and answers and every 
   time I go to hit Publish (or Update) it gives me a “fatal error” message on a
   white screen and then deletes everything I entered. It saves the tree in the 
   menu, but deletes all of the information inside it.
 * Here is the error message:
    Fatal error: Call to undefined function wp_slash()
   in /home/onestudent/www/wp-content/plugins/sidecar-decision-tree/DecisionTree.
   php on line 143
 * Perhaps it’s because they are on an ancient version of WordPress?
 * [https://wordpress.org/plugins/sidecar-decision-tree/](https://wordpress.org/plugins/sidecar-decision-tree/)

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

 *  Plugin Author [Sidecar TV, Plugin Developers](https://wordpress.org/support/users/sidecar/)
 * (@sidecar)
 * [10 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-1681/#post-6228802)
 * JenniMcKay – Possibly! A little research shows that `wp_slash()` was introduced
   in 3.6. Do you know what ancient version of WordPress they’re using?
 * If it’s before 3.6, then my apologies! I see that we say we work back as far 
   as 3.0, which might not be correct.
 *  Plugin Author [Sidecar TV, Plugin Developers](https://wordpress.org/support/users/sidecar/)
 * (@sidecar)
 * [10 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-1681/#post-6228814)
 * JenniMcKay – I just used MultiPressDev to install all versions of WordPress:
 *  [https://github.com/Ths2-9Y-LqJt6/MultiPressDev](https://github.com/Ths2-9Y-LqJt6/MultiPressDev)
 * After installing our plugin in both 3.5 and 3.6, I was able to reproduce your
   error. So, indeed, sorry! Our docs say we support back to 3.0, but for now we
   only support back to 3.6. We’ll certainly fix our docs to say we only support
   3.6 and later and we’ll also look to add support for earlier versions.
 * For now, your only option is up upgrade WordPress to at least 3.6 or later.

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

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

 * ![](https://s.w.org/plugins/geopattern-icon/sidecar-decision-tree_add8e6.svg)
 * [Decision Tree](https://wordpress.org/plugins/sidecar-decision-tree/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/sidecar-decision-tree/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/sidecar-decision-tree/)
 * [Active Topics](https://wordpress.org/support/plugin/sidecar-decision-tree/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/sidecar-decision-tree/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/sidecar-decision-tree/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [Sidecar TV, Plugin Developers](https://wordpress.org/support/users/sidecar/)
 * Last activity: [10 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-1681/#post-6228814)
 * Status: resolved