Title: wp_yarpp_related_cache' doesn't exist
Last modified: August 21, 2016

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# wp_yarpp_related_cache' doesn't exist

 *  [JPo](https://wordpress.org/support/users/jrmyprtr/)
 * (@jrmyprtr)
 * [12 years, 10 months ago](https://wordpress.org/support/topic/wp_yarpp_related_cache-doesnt-exist/)
 * Hi,
 * I just added this plugin and when I activated I got the following errors:
 * WordPress database error: [Table ‘*.wp_yarpp_related_cache’ doesn’t exist]
    truncate
   table `wp_yarpp_related_cache` WordPress database error: [Table ‘*.wp_yarpp_related_cache’
   doesn’t exist] truncate table `wp_yarpp_related_cache`
 * When I go to the YARPP settings I see this message:
 * YARPP’s “consider titles” and “consider bodies” relatedness criteria require 
   your wp_posts table to use the MyISAM storage engine, but the table seems to 
   be using the InnoDB engine. These two options have been disabled.
    To restore
   these features, please update your wp_posts table by executing the following 
   SQL directive: ALTER TABLE `wp_posts` ENGINE = MyISAM; . No data will be erased
   by altering the table’s engine, although there are performance implications. 
   If, despite this check, you are sure that wp_posts is using the MyISAM engine,
   press this magic button:
 * Are these related issues?
 * Running MySQL 5.1.68-cll and PHP 5.3.28
 * I have disabled the plugin for now.
 * [http://wordpress.org/plugins/yet-another-related-posts-plugin/](http://wordpress.org/plugins/yet-another-related-posts-plugin/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [YARPP](https://wordpress.org/support/users/jeffparker/)
 * (@jeffparker)
 * [12 years, 10 months ago](https://wordpress.org/support/topic/wp_yarpp_related_cache-doesnt-exist/#post-4423310)
 * Is your database engine InnoDB? If so, that’s a legitimate message. You can still
   use YARPP Basic but it won’t take advantage of Titles or Bodies.
 * Or you can enable the new YARPP Pro enhancements, which doesn’t care what type
   of engine your database is because the content is crawled externally.

Viewing 1 replies (of 1 total)

 The topic ‘wp_yarpp_related_cache' doesn't exist’ is closed to new replies.

 * ![](https://ps.w.org/yet-another-related-posts-plugin/assets/icon-256x256.png?
   rev=2549977)
 * [YARPP - Yet Another Related Posts Plugin](https://wordpress.org/plugins/yet-another-related-posts-plugin/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/yet-another-related-posts-plugin/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/yet-another-related-posts-plugin/)
 * [Active Topics](https://wordpress.org/support/plugin/yet-another-related-posts-plugin/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/yet-another-related-posts-plugin/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/yet-another-related-posts-plugin/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [YARPP](https://wordpress.org/support/users/jeffparker/)
 * Last activity: [12 years, 10 months ago](https://wordpress.org/support/topic/wp_yarpp_related_cache-doesnt-exist/#post-4423310)
 * Status: not resolved