Title: child theme error
Last modified: August 24, 2016

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# child theme error

 *  [gturban](https://wordpress.org/support/users/gturban/)
 * (@gturban)
 * [11 years, 1 month ago](https://wordpress.org/support/topic/child-theme-error-4/)
 * I’m trying to set up a child theme to ease future development, but I’m getting
   following error in connection with the recent post extended widget when preview
   the child theme.
 * Warning: call_user_func_array() expects parameter 1 to be a valid callback, function‘
   custom_excerpt_length’ not found or invalid function name in /homepages/28/d299945521/
   htdocs/clickandbuilds/WordPress/websitehome/wp-includes/plugin.php on line 213
 * What is the cause of this error? and how can it be solved?
 * [https://wordpress.org/plugins/recent-posts-widget-extended/](https://wordpress.org/plugins/recent-posts-widget-extended/)

The topic ‘child theme error’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/recent-posts-widget-extended_3384ca.
   svg)
 * [Recent Posts Widget Extended](https://wordpress.org/plugins/recent-posts-widget-extended/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/recent-posts-widget-extended/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/recent-posts-widget-extended/)
 * [Active Topics](https://wordpress.org/support/plugin/recent-posts-widget-extended/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/recent-posts-widget-extended/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/recent-posts-widget-extended/reviews/)

## Tags

 * [child theme](https://wordpress.org/support/topic-tag/child-theme/)
 * [error plugin](https://wordpress.org/support/topic-tag/error-plugin/)

 * 0 replies
 * 1 participant
 * Last reply from: [gturban](https://wordpress.org/support/users/gturban/)
 * Last activity: [11 years, 1 month ago](https://wordpress.org/support/topic/child-theme-error-4/)
 * Status: not resolved