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

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# Error when activating

 *  Resolved [Dinz](https://wordpress.org/support/users/dinz/)
 * (@dinz)
 * [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-activating-15/)
 * On a couple of site I got this Error when activating:
 * > 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.
 * I hope you develop this plugin further. It’s a must!
 * Andris
 * [https://wordpress.org/plugins/archive/](https://wordpress.org/plugins/archive/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Thread Starter [Dinz](https://wordpress.org/support/users/dinz/)
 * (@dinz)
 * [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-activating-15/#post-5970097)
 * Also, with the plugin activated and then trying to publish a post I got this 
   warning:
 * > Warning: Cannot modify header information – headers already sent by (output
   > started at /home/loudmoun/public_html/wp-content/plugins/archive/archive.php:
   > 1) in /home/loudmoun/public_html/wp-admin/post.php on line 233
   > Warning: Cannot modify header information – headers already sent by (output
   > started at /home/loudmoun/public_html/wp-content/plugins/archive/archive.php:
   > 1) in /home/loudmoun/public_html/wp-includes/pluggable.php on line 1178
 *  Plugin Author [Frank Bueltge](https://wordpress.org/support/users/bueltge/)
 * (@bueltge)
 * [11 years, 1 month ago](https://wordpress.org/support/topic/error-when-activating-15/#post-5970354)
 * Thanks for the hint. I have update the plugin, was a wrong file in the last release
   and now, I hope, it works without errors.

Viewing 2 replies - 1 through 2 (of 2 total)

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 * 2 replies
 * 2 participants
 * Last reply from: [Frank Bueltge](https://wordpress.org/support/users/bueltge/)
 * Last activity: [11 years, 1 month ago](https://wordpress.org/support/topic/error-when-activating-15/#post-5970354)
 * Status: resolved