Title: Cannot modify header information
Last modified: August 30, 2016

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# Cannot modify header information

 *  Resolved [Red Deer Web Design](https://wordpress.org/support/users/bdbolin/)
 * (@bdbolin)
 * [10 years, 8 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-107/)
 * `Warning: Cannot modify header information - headers already sent by (output 
   started at /wp-includes/formatting.php:957) in /wp-includes/pluggable.php on 
   line 1207`
 * I seem to get the following error when bulk editing posts. For example, selecting
   5 and changing it’s taxonomy/category, or any setting really.
 * Any ideas? Thanks in advance.

Viewing 4 replies - 1 through 4 (of 4 total)

 *  [accuwebhosting](https://wordpress.org/support/users/accuwebhosting/)
 * (@accuwebhosting)
 * [10 years, 8 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-107/#post-6505658)
 * Hi,
 * Check file formatting.php file and clear the empty space or line break at beginning
   of file or end of file (or both).
 * [http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F](http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F)
 * Thanks,
 *  Thread Starter [Red Deer Web Design](https://wordpress.org/support/users/bdbolin/)
 * (@bdbolin)
 * [10 years, 8 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-107/#post-6505742)
 * Isn’t that a core WP file though? How can formatting already be broken?
 *  Thread Starter [Red Deer Web Design](https://wordpress.org/support/users/bdbolin/)
 * (@bdbolin)
 * [10 years, 8 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-107/#post-6505743)
 * I checked and don’t see any empty space before or ending.
 *  Thread Starter [Red Deer Web Design](https://wordpress.org/support/users/bdbolin/)
 * (@bdbolin)
 * [10 years, 8 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-107/#post-6505748)
 * Found it – conflicting plugin “adminimizer”. Thanks for suggestions

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Cannot modify header information’ is closed to new replies.

## Tags

 * [Cannot modify header information](https://wordpress.org/support/topic-tag/cannot-modify-header-information/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 4 replies
 * 2 participants
 * Last reply from: [Red Deer Web Design](https://wordpress.org/support/users/bdbolin/)
 * Last activity: [10 years, 8 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-107/#post-6505748)
 * Status: resolved

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