Title: Header Modify Error
Last modified: September 14, 2018

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# Header Modify Error

 *  [vanlalvena](https://wordpress.org/support/users/vanlalvena/)
 * (@vanlalvena)
 * [7 years, 8 months ago](https://wordpress.org/support/topic/header-modify-error/)
 * On updating a post I’m getting the following error (database name changed to 
   xyz)
    Warning: Cannot modify header information – headers already sent by (output
   started at /home/xyz/public_html/wp-content/plugins/multi-column-tag-map/mctagmap_functions.
   php:59) in /home/xyz/public_html/wp-admin/post.php on line 198
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/xyz/public_html/wp-content/plugins/multi-column-tag-map/mctagmap_functions.
   php:59) in /home/xyz/public_html/wp-includes/pluggable.php on line 1219
 * Post itself is live but I’m concerned about this “warning”,
 * kindly assist
    thanks

The topic ‘Header Modify Error’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last activity: [7 years, 8 months ago](https://wordpress.org/support/topic/header-modify-error/)
 * Status: not resolved