Title: Warning: Cannot modify header information Last modified: August 19, 2016 --- # Warning: Cannot modify header information * [mentortony](https://wordpress.org/support/users/mentortony/) * (@mentortony) * [16 years, 10 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-33/) * I just upgraded to the latest a day ago. Since I’m new to blogging I was going through a checklist of necessary plugins. All was going well until I attempted to activate the automatic Upgrade. What I received was an WARNING MESSAGE in my dashboard. Now when I try to log back into to dashboard I can’t and receive several lines of this: * Warning: include_once(/home/content/m/e/n/mentortony/html/wp-content/plugins/ wordpress/) [function.include-once]: failed to open stream: Success in /home/ content/m/e/n/mentortony/html/wp-settings.php on line 473 * Warning: include_once() [function.include]: Failed opening ‘/home/content/m/e/ n/mentortony/html/wp-content/plugins/wordpress/’ for inclusion (include_path=’.:/ usr/local/php5/lib/php’) in /home/content/m/e/n/mentortony/html/wp-settings.php on line 473 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/m/e/n/mentortony/html/wp-settings.php:473) in /home/content/ m/e/n/mentortony/html/wp-login.php on line 255 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/m/e/n/mentortony/html/wp-settings.php:473) in /home/content/ m/e/n/mentortony/html/wp-login.php on line 267 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/m/e/n/mentortony/html/wp-settings.php:473) in /home/content/ m/e/n/mentortony/html/wp-includes/pluggable.php on line 649 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/m/e/n/mentortony/html/wp-settings.php:473) in /home/content/ m/e/n/mentortony/html/wp-includes/pluggable.php on line 650 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/m/e/n/mentortony/html/wp-settings.php:473) in /home/content/ m/e/n/mentortony/html/wp-includes/pluggable.php on line 651 * Warning: Cannot modify header information – headers already sent by (output started at /home/content/m/e/n/mentortony/html/wp-settings.php:473) in /home/content/ m/e/n/mentortony/html/wp-content/plugins/ylsy_permalink_redirect.php on line 403 * I need help and I’m new to blogging and can easily get overwhelmed by technology. * Suggestions? Ideas? Assistance? * Thanks in advance! Viewing 4 replies - 1 through 4 (of 4 total) * [esmi](https://wordpress.org/support/users/esmi/) * (@esmi) * [16 years, 10 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-33/#post-1170071) * [http://codex.wordpress.org/Answers-Trouble_Shooting#Headers_already_sent](http://codex.wordpress.org/Answers-Trouble_Shooting#Headers_already_sent) [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) * Thread Starter [mentortony](https://wordpress.org/support/users/mentortony/) * (@mentortony) * [16 years, 10 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-33/#post-1170216) * Thanks for your reply but I am still perplexed. * You wrote: * 1. Download the file mentioned in the error message. _What file mentioned in the error message? How do I recognize a file in that string of information?_ * 2. Open that file in a plain text editor (NOT MS Word or similar. Notepad or BBEdit are fine). _This I can do once I’ve found it._ * 3. Check that the very first characters are _Ditto._ * What do I do with this after it’s been corrected? Mustn’t it be loaded somewhere? * And please take note: **I CANNOT LOG INTO MY DASHBOARD.** * Thanks once again. * [whooami](https://wordpress.org/support/users/whooami/) * (@whooami) * [16 years, 10 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-33/#post-1170218) * [whooami](https://wordpress.org/support/users/whooami/) * (@whooami) * [16 years, 10 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-33/#post-1170219) * backing up.. * “All was going well until I attempted to activate the automatic Upgrade. What I received was an WARNING MESSAGE in my dashboard.” * you do NOT need that plugin anymore. * Use your FTP client, and delete that plugin and all its files off your web space. Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘Warning: Cannot modify header information’ is closed to new replies. ## Tags * [automatic upgrade](https://wordpress.org/support/topic-tag/automatic-upgrade/) * [warning](https://wordpress.org/support/topic-tag/warning/) * 4 replies * 3 participants * Last reply from: [whooami](https://wordpress.org/support/users/whooami/) * Last activity: [16 years, 10 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-33/#post-1170219) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics