Title: Warning: Cannot modify header information
Last modified: August 24, 2016

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# Warning: Cannot modify header information

 *  Resolved [ebci888](https://wordpress.org/support/users/ebci888/)
 * (@ebci888)
 * [11 years ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-156/)
 * I have just updated to WordPress 4.2.1, and FEEDZY RSS Feeds Version 2.4.4.
 * When I activate the plugin, it shows this warning:
 * “The plugin generated 3 characters of unexpected output during activation. If
   you notice “headers already sent” messages, problems with syndication feeds or
   other issues, try deactivating or removing this plugin.”
 * Then I see this error when I tried to get into “…/wp-admin/”:
 * “Warning: Cannot modify header information – headers already sent by (output 
   started at …/wp-content/plugins/feedzy-rss-feeds/feedzy-rss-feeds-shortcode.php:
   1) in …/wp-includes/pluggable.php on line 1196”
 * Do you know how I can solve this? Thank you.
 * Erick
 * [https://wordpress.org/plugins/feedzy-rss-feeds/](https://wordpress.org/plugins/feedzy-rss-feeds/)

Viewing 1 replies (of 1 total)

 *  [Brice Capobianco](https://wordpress.org/support/users/brikou/)
 * (@brikou)
 * [11 years ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-156/#post-6081994)
 * Hi Erick,
    I’m sorry but I never had this warning, even if I’m in debug mode.
   My version of is the same as yours. In any case, have a look at your feed. If
   it is not a blank page, everything is OK. Cheers

Viewing 1 replies (of 1 total)

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

 * ![](https://ps.w.org/feedzy-rss-feeds/assets/icon-256x256.gif?rev=3418285)
 * [RSS Aggregator by Feedzy – Feed to Post, Autoblogging, News & YouTube Video Feeds Aggregator](https://wordpress.org/plugins/feedzy-rss-feeds/)
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## Tags

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

 * 1 reply
 * 2 participants
 * Last reply from: [Brice Capobianco](https://wordpress.org/support/users/brikou/)
 * Last activity: [11 years ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-156/#post-6081994)
 * Status: resolved