Title: Unexpected Output Error
Last modified: August 22, 2016

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# Unexpected Output Error

 *  Resolved [Howdy_McGee](https://wordpress.org/support/users/howdy_mcgee/)
 * (@howdy_mcgee)
 * [11 years, 6 months ago](https://wordpress.org/support/topic/unexpected-output-error-2/)
 * I installed this plugin last in a series of plugins I usually install on my WP
   sites. The plugins are in order of installation:
 * 1) Really Simple Captcha
    2) Contact Form 7 3) All in One WP Security and Firewall
 * I get the following error:
 * `The plugin generated 144 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.`
 * [https://wordpress.org/plugins/wp-mailto-links/](https://wordpress.org/plugins/wp-mailto-links/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Thread Starter [Howdy_McGee](https://wordpress.org/support/users/howdy_mcgee/)
 * (@howdy_mcgee)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/unexpected-output-error-2/#post-5417260)
 * I am still getting this error:
 * `The plugin generated 161 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 update on what could be causing this?…
 *  [Pi Zi](https://wordpress.org/support/users/freelancephp/)
 * (@freelancephp)
 * [11 years, 2 months ago](https://wordpress.org/support/topic/unexpected-output-error-2/#post-5417282)
 * I cannot reproduce this issue.
    When does it occur?
 *  [Pi Zi](https://wordpress.org/support/users/freelancephp/)
 * (@freelancephp)
 * [11 years, 1 month ago](https://wordpress.org/support/topic/unexpected-output-error-2/#post-5417289)
 * The error occured on the plugins page in the admin.
    Should be solved in new 
   release 1.51.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Unexpected Output Error’ is closed to new replies.

 * ![](https://ps.w.org/wp-mailto-links/assets/icon-256x256.png?rev=2057013)
 * [WP Mailto Links - Protect Email Addresses](https://wordpress.org/plugins/wp-mailto-links/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-mailto-links/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-mailto-links/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-mailto-links/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-mailto-links/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-mailto-links/reviews/)

## Tags

 * [err](https://wordpress.org/support/topic-tag/err/)
 * [or](https://wordpress.org/support/topic-tag/or/)
 * [warning](https://wordpress.org/support/topic-tag/warning/)

 * 3 replies
 * 2 participants
 * Last reply from: [Pi Zi](https://wordpress.org/support/users/freelancephp/)
 * Last activity: [11 years, 1 month ago](https://wordpress.org/support/topic/unexpected-output-error-2/#post-5417289)
 * Status: resolved