Title: [Plugin: FeedWordPress] Warning: Cannot modify header information – headers already sent by Last modified: August 20, 2016 --- # [Plugin: FeedWordPress] Warning: Cannot modify header information – headers already sent by * [Linked Local Network](https://wordpress.org/support/users/fredmcmurray/) * (@fredmcmurray) * [13 years, 10 months ago](https://wordpress.org/support/topic/plugin-feedwordpress-warning-cannot-modify-header-information-headers-already-sent-by/) * I installed Feedwordpress on a new wp3.4 website. The only plugins active is Jetpack. I receive the following errors: Warning: Cannot modify header information– headers already sent by (output started at /homepages/39/d284713208/htdocs/llnwheeling/ wp-content/plugins/feedwordpress/feedwordpress.php:1) in /homepages/39/d284713208/ htdocs/llnwheeling/wp-includes/option.php on line 563 * Warning: Cannot modify header information – headers already sent by (output started at /homepages/39/d284713208/htdocs/llnwheeling/wp-content/plugins/feedwordpress/ feedwordpress.php:1) in /homepages/39/d284713208/htdocs/llnwheeling/wp-includes/ option.php on line 564 * I created a campaign and the campaign posts from the feed I added but I get the error message no matter what I do in the wordpress dashboard. * If I try to add a new category I receive the following error message: Warning: Cannot modify header information – headers already sent by (output started at/ homepages/39/d284713208/htdocs/llnwheeling/wp-content/plugins/feedwordpress/feedwordpress. php:1) in /homepages/39/d284713208/htdocs/llnwheeling/wp-includes/class-wp-ajax- response.php on line 129 LLN]]> ]]> * Please help. * [http://wordpress.org/extend/plugins/feedwordpress/](http://wordpress.org/extend/plugins/feedwordpress/) Viewing 5 replies - 1 through 5 (of 5 total) * [jedh6567](https://wordpress.org/support/users/jedh6567/) * (@jedh6567) * [13 years, 10 months ago](https://wordpress.org/support/topic/plugin-feedwordpress-warning-cannot-modify-header-information-headers-already-sent-by/#post-2839057) * Go to the plugin page and click edit. Then search for this string “wp_admin_css(‘ css/dashboard’)” when you find it comment it out with 2 forward slashes “//”. So when you’re done it looks like this “//wp_admin_css(‘css/dashboard’)”. I’m not sure why it throws the error but it went away after I commented out that line of code. * Good Luck * Thread Starter [Linked Local Network](https://wordpress.org/support/users/fredmcmurray/) * (@fredmcmurray) * [13 years, 10 months ago](https://wordpress.org/support/topic/plugin-feedwordpress-warning-cannot-modify-header-information-headers-already-sent-by/#post-2839058) * Hi jedh6567 * Thanks for the info. I tried that fix and I still get the error. It looks like it blows up on Line 1 of feedwordpress.php. Anyone else have any ideas? * Thread Starter [Linked Local Network](https://wordpress.org/support/users/fredmcmurray/) * (@fredmcmurray) * [13 years, 10 months ago](https://wordpress.org/support/topic/plugin-feedwordpress-warning-cannot-modify-header-information-headers-already-sent-by/#post-2839078) * I’ve deactivated all plugins. When I activate the plugin I receive the following message: * The plugin generated 4 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. * Any thoughts? * [ilittauer](https://wordpress.org/support/users/ilittauer/) * (@ilittauer) * [13 years, 10 months ago](https://wordpress.org/support/topic/plugin-feedwordpress-warning-cannot-modify-header-information-headers-already-sent-by/#post-2839084) * I am receiving the same error. Does anybody have a remedy? Thanks! * [ainachris](https://wordpress.org/support/users/ainachris/) * (@ainachris) * [13 years, 9 months ago](https://wordpress.org/support/topic/plugin-feedwordpress-warning-cannot-modify-header-information-headers-already-sent-by/#post-2839110) * I left a comment on a different note but this is the same error that I received. I am running wordpress multisite and I saw the same error. It said: * Warning: Cannot modify header information – headers already sent by (output started at /homepages/39/d284713208/htdocs/llnwheeling/wp-content/plugins/feedwordpress/ feedwordpress.php:1) in /homepages/39/d284713208/htdocs/llnwheeling/wp-includes/ option.php on line 563 * Warning: Cannot modify header information – headers already sent by (output started at /homepages/39/d284713208/htdocs/llnwheeling/wp-content/plugins/feedwordpress/ feedwordpress.php:1) in /homepages/39/d284713208/htdocs/llnwheeling/wp-includes/ option.php on line 564 * I will try to comment out the lines that were mentioned above. Is there an update expected for this issue? Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘[Plugin: FeedWordPress] Warning: Cannot modify header information – headers already sent by’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/feedwordpress_a6a79a.svg) * [FeedWordPress](https://wordpress.org/plugins/feedwordpress/) * [Support Threads](https://wordpress.org/support/plugin/feedwordpress/) * [Active Topics](https://wordpress.org/support/plugin/feedwordpress/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/feedwordpress/unresolved/) * [Reviews](https://wordpress.org/support/plugin/feedwordpress/reviews/) ## Tags * [Cannot modify header information](https://wordpress.org/support/topic-tag/cannot-modify-header-information/) * 5 replies * 4 participants * Last reply from: [ainachris](https://wordpress.org/support/users/ainachris/) * Last activity: [13 years, 9 months ago](https://wordpress.org/support/topic/plugin-feedwordpress-warning-cannot-modify-header-information-headers-already-sent-by/#post-2839110) * Status: not resolved