Title: Error when activating the plugin
Last modified: August 24, 2016

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# Error when activating the plugin

 *  Resolved [petterfeed](https://wordpress.org/support/users/petterfeed/)
 * (@petterfeed)
 * [11 years ago](https://wordpress.org/support/topic/error-when-activating-the-plugin-8/)
 * I get this error when activating:
 * The plugin generated 182 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.
 * Also i have dev mode turned on and get this error:
 * Notice: Undefined index: IS_WPMU in /wp-content/plugins/wp-invites/wp-invites.
   php on line 182
 * [https://wordpress.org/plugins/wp-invites/](https://wordpress.org/plugins/wp-invites/)

The topic ‘Error when activating the plugin’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/wp-invites.svg)
 * [WP-Invites](https://wordpress.org/plugins/wp-invites/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-invites/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-invites/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-invites/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-invites/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-invites/reviews/)

 * 0 replies
 * 1 participant
 * Last reply from: [petterfeed](https://wordpress.org/support/users/petterfeed/)
 * Last activity: [11 years ago](https://wordpress.org/support/topic/error-when-activating-the-plugin-8/)
 * Status: resolved