Title: Thumbnail Issues
Last modified: August 20, 2016

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# Thumbnail Issues

 *  [wpuser429](https://wordpress.org/support/users/wpuser429/)
 * (@wpuser429)
 * [14 years, 11 months ago](https://wordpress.org/support/topic/thumbnail-issues-1/)
 * Hello,
 * Thanks for the great plugin.
 * I am receiving the following error when I enable thumbnails:
 * Fatal error: Call to undefined function has_post_thumbnail() in /home/…/public_html/
   wp-content/plugins/list-category-posts/include/CatList.php on line 195
 * Any ideas? Thanks for your help!

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

 *  Thread Starter [wpuser429](https://wordpress.org/support/users/wpuser429/)
 * (@wpuser429)
 * [14 years, 11 months ago](https://wordpress.org/support/topic/thumbnail-issues-1/#post-2124460)
 * Sorry, this is in relation to the **List category posts **plugin. I was not sure
   where to post this.
 * Thanks!
 *  Plugin Author [Fernando Briano](https://wordpress.org/support/users/fernandobt/)
 * (@fernandobt)
 * [14 years, 6 months ago](https://wordpress.org/support/topic/thumbnail-issues-1/#post-2124773)
 * Hey thanks for using the plugin!
    From [this other post](http://wordpress.org/support/topic/fatal-error-call-to-undefined-function-has_post_thumbnail?replies=7)
   on the forum:
 * > has_post_thumbnail() is a standard WP 3.0 template tag:
   >  [http://codex.wordpress.org/Function_Reference/has_post_thumbnail](http://codex.wordpress.org/Function_Reference/has_post_thumbnail)
   > Try switching to the TwentyTen theme and see if that helps.
   > (…)
   > Your theme has to call add_theme_support(‘post-thumbnails’) in an after_setup_theme
   > action. Otherwise the post-thumbnail functions aren’t included. See the TwentyTen
   > theme for an example of how it’s done.
 *  [Workshopshed](https://wordpress.org/support/users/workshopshed/)
 * (@workshopshed)
 * [14 years, 6 months ago](https://wordpress.org/support/topic/thumbnail-issues-1/#post-2124774)
 * I don’t believe my theme has thumbnail support, if I turn on the thumbnails then
   my page stops rendering after the title.

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

The topic ‘Thumbnail Issues’ is closed to new replies.

 * ![](https://ps.w.org/list-category-posts/assets/icon-256x256.png?rev=2517221)
 * [List category posts](https://wordpress.org/plugins/list-category-posts/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/list-category-posts/unresolved/)
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 * 3 replies
 * 3 participants
 * Last reply from: [Workshopshed](https://wordpress.org/support/users/workshopshed/)
 * Last activity: [14 years, 6 months ago](https://wordpress.org/support/topic/thumbnail-issues-1/#post-2124774)
 * Status: not resolved