Title: Plugin Activation Error
Last modified: August 31, 2016

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# Plugin Activation Error

 *  Resolved [cgoldberger](https://wordpress.org/support/users/cgoldberger/)
 * (@cgoldberger)
 * [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-activation-error-12/)
 * I have the pro version of this plugin. I just tried activating it in my plugins,
   and I received the following error.
    “The plugin generated 12096 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 insight?
 * [https://wordpress.org/plugins/calculated-fields-form/](https://wordpress.org/plugins/calculated-fields-form/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [codepeople](https://wordpress.org/support/users/codepeople/)
 * (@codepeople)
 * [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-activation-error-12/#post-6953755)
 * Hi,
 * I’ve installed and activated the list of plugins below, for detecting all possible
   issues in our plugins:
 * – Debug “unexpected output” During Plugin Activation
    – Debug Bar – Log Deprecated
   Notices
 * And I’ve not received the error message you describe in the installation process
   of the plugin.
 * Please, install the plugin following the instructions in the webpage:
 * [http://cff.dwbooster.com/documentation#installation](http://cff.dwbooster.com/documentation#installation)
 * Note: In the upgrade process from the free version of the plugin to the pro, 
   the plugin checks the structure of its database and alters it to include some
   new columns. If the user associated to the database in your WordPress, has not
   permissions to modify the database, the upgrade process can generate some notices.
 * If the issue persist, please, do not hesitate in create a ticket in my private
   support page:
 * [http://cff.dwbooster.com/contact-us](http://cff.dwbooster.com/contact-us)
 * Best regards.

Viewing 1 replies (of 1 total)

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

 * ![](https://ps.w.org/calculated-fields-form/assets/icon-256x256.jpg?rev=1734377)
 * [Calculated Fields Form](https://wordpress.org/plugins/calculated-fields-form/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/calculated-fields-form/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/calculated-fields-form/)
 * [Active Topics](https://wordpress.org/support/plugin/calculated-fields-form/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/calculated-fields-form/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/calculated-fields-form/reviews/)

## Tags

 * [plugin error](https://wordpress.org/support/topic-tag/plugin-error/)
 * [unexpected output](https://wordpress.org/support/topic-tag/unexpected-output/)

 * 1 reply
 * 2 participants
 * Last reply from: [codepeople](https://wordpress.org/support/users/codepeople/)
 * Last activity: [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-activation-error-12/#post-6953755)
 * Status: resolved