Title: Error Message Upon Plugin Activation
Last modified: August 20, 2016

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# Error Message Upon Plugin Activation

 *  Resolved [tgbauer77](https://wordpress.org/support/users/tgbauer77/)
 * (@tgbauer77)
 * [14 years, 10 months ago](https://wordpress.org/support/topic/error-message-upon-plugin-activation/)
 * Here is my error message:
 * > The plugin generated 54 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.
 * I tried deleting and reinstalling/reactivating twice to no avail.
 * This a great plugin, so any help you can provide to get this up and running would
   be great.

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [stvwlf](https://wordpress.org/support/users/stvwlf/)
 * (@stvwlf)
 * [14 years, 10 months ago](https://wordpress.org/support/topic/error-message-upon-plugin-activation/#post-2099677)
 * You only saw this once, during plugin activation, correct?
 * Do you see it every time you load a page in the admin?
 * Is the plugin working correctly?
 * Most of the time this is a one time error during plugin activation. If the plugin
   is working as intended you can usually ignore that message.
 * Its usually a small coding error by the plugin’s author or possibly a small conflict
   with another already installed plugin.
 * If you see it every time or the plugin doesn’t work then yes its something that
   needs to be dealt with.
 *  [lavieenrose](https://wordpress.org/support/users/lavieenrose/)
 * (@lavieenrose)
 * [14 years, 10 months ago](https://wordpress.org/support/topic/error-message-upon-plugin-activation/#post-2099961)
 * I received the EXACT same message…
 * what does this mean??
 * I deactivated this until it’s addressed.
 *  [fotofio](https://wordpress.org/support/users/fotofio/)
 * (@fotofio)
 * [14 years, 7 months ago](https://wordpress.org/support/topic/error-message-upon-plugin-activation/#post-2100007)
 * I’ve been developing a content slider for WP. Was working fine on 2.9.1, but 
   when moved to current version of WP, it generates the same error message on activation–
   > 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.
 * As stvwlf points out above, where the message does not persist (is a one-time
   error during activation only), and the plugin works as expected without generating
   any additional errors, it’s probably ok to let it go.
 * However, I did wish to share a new plugin with the WP community. As it is, I 
   must supply a laughable caveat, but morevover, such will not fly for the vast
   majority of potential users, including myself.
 * There has to be a sensible way to discover the cause. More suggestions please….
 *  [fotofio](https://wordpress.org/support/users/fotofio/)
 * (@fotofio)
 * [14 years, 7 months ago](https://wordpress.org/support/topic/error-message-upon-plugin-activation/#post-2100008)
 * Continued from above::::
    I have a fresh install of WP3.2.1 w/no other plugins
   activated, and only the default installation of theme/page/post/comment.
 * By the way, I have a sneaking suspicion that the error is more MySQL than PHP.
 * Have tried various file encodings: unix/utf-8, unix/utf-8 no BOM, unix/ansi
 * checked all before and after whitespace <?php ?>
 * checked folder/file permissions
 * Wrapped the activation hook in a conditional:::::
    if (is_admin()) { register_activation_hook(
   __FILE__,’avoslider_plugin_install’); }
 *  [Arnan de Gans](https://wordpress.org/support/users/shrikee/)
 * (@shrikee)
 * [14 years, 7 months ago](https://wordpress.org/support/topic/error-message-upon-plugin-activation/#post-2100011)
 * [http://adrotateplugin.com/page/manuals.php](http://adrotateplugin.com/page/manuals.php)
   read the 3rd issue/question

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Error Message Upon Plugin Activation’ is closed to new replies.

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 * 5 replies
 * 5 participants
 * Last reply from: [Arnan de Gans](https://wordpress.org/support/users/shrikee/)
 * Last activity: [14 years, 7 months ago](https://wordpress.org/support/topic/error-message-upon-plugin-activation/#post-2100011)
 * Status: resolved