Title: Error on activting plugin
Last modified: August 22, 2016

---

# Error on activting plugin

 *  Resolved [Beaverman](https://wordpress.org/support/users/beaverman/)
 * (@beaverman)
 * [11 years, 2 months ago](https://wordpress.org/support/topic/error-on-activting-plugin/)
 * Hi, I looked at this plugin as it might be just what I need for a simple project
   that is invariably turning out to be much much longer than I wanted it to be,
   but hey ho! I essentially want to create a post that has a single random image
   from my media folder (or another specified location) in it.
 * Anyway, I got this error when I activated it:
 * Fatal error: Call to undefined function cmb_metabox_form() in /home/content/90/
   11698390/html/sr/wp-content/plugins/wp-random-post-thumbnails/classes/class-wprpt-
   options.php on line 127
 * Im running WordPress 4.1.1 using the Fifteen theme.
 * [https://wordpress.org/plugins/wp-random-post-thumbnails/](https://wordpress.org/plugins/wp-random-post-thumbnails/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Brianna Deleasa](https://wordpress.org/support/users/bdeleasa/)
 * (@bdeleasa)
 * [11 years, 2 months ago](https://wordpress.org/support/topic/error-on-activting-plugin/#post-5954834)
 * Hello Beaverman!
 * Thank you for reaching out (and thanks for giving my plugin a shot)! I was able
   to duplicate your issue and it is now fixed. Please update to the latest version
   of the plugin.
 * From what you’re describing, I think this plugin should help you do what you 
   need (provided you want the image to be the _featured image_ of the single post).
   For the single post you’d like to show a random image for, don’t set a featured
   image. Any posts _without_ a featured image will show one of the random images
   uploaded through the settings page as the featured image for that post.
 * If this isn’t exactly what you’re looking for, please let me know! I’m open to
   adding additional functionality to meet your needs. 🙂

Viewing 1 replies (of 1 total)

The topic ‘Error on activting plugin’ is closed to new replies.

 * ![](https://ps.w.org/wp-random-post-thumbnails/assets/icon-256x256.png?rev=1541376)
 * [WP Random Post Thumbnails](https://wordpress.org/plugins/wp-random-post-thumbnails/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-random-post-thumbnails/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-random-post-thumbnails/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-random-post-thumbnails/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-random-post-thumbnails/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-random-post-thumbnails/reviews/)

## Tags

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

 * 1 reply
 * 2 participants
 * Last reply from: [Brianna Deleasa](https://wordpress.org/support/users/bdeleasa/)
 * Last activity: [11 years, 2 months ago](https://wordpress.org/support/topic/error-on-activting-plugin/#post-5954834)
 * Status: resolved