Title: WP_DEBUG messages
Last modified: August 24, 2016

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# WP_DEBUG messages

 *  [Clifford Paulick](https://wordpress.org/support/users/cliffpaulick/)
 * (@cliffpaulick)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/wp_debug-messages-3/)
 * Upon initial activation:
 * > Notice: Undefined offset: 0 in /wp-content/plugins/usermap/userMap.php on line
   > 59
 * > Notice: Trying to get property of non-object in /wp-content/plugins/usermap/
   > userMap.php on line 59
 * When trying to edit a post, those 2 plus these 2 are displayed:
 * > Warning: Cannot modify header information – headers already sent by (output
   > started at /wp-content/plugins/usermap/userMap.php:59) in /wp-admin/post.php
   > on line 235
 * > Warning: Cannot modify header information – headers already sent by (output
   > started at /wp-content/plugins/usermap/userMap.php:59) in /wp-includes/pluggable.
   > php on line 1196
 * [https://wordpress.org/plugins/usermap/](https://wordpress.org/plugins/usermap/)

The topic ‘WP_DEBUG messages’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [Clifford Paulick](https://wordpress.org/support/users/cliffpaulick/)
 * Last activity: [10 years, 11 months ago](https://wordpress.org/support/topic/wp_debug-messages-3/)
 * Status: not resolved