Title: activate the plugin generates an error
Last modified: August 30, 2016

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# activate the plugin generates an error

 *  Resolved [jomaga](https://wordpress.org/support/users/jomaga/)
 * (@jomaga)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/activate-the-plugin-generates-an-error/)
 * Hi,
 * the following error message is displayed during the activation:
 * Das Plugin kann nicht aktiviert werden, da es einen fatalen Fehler erzeugt.
 * Fatal error: Call to a member function query() on a non-object in /***_content/
   plugins/participants-database/classes/PDb_Init.class.php on line 158
 * Warning: Cannot modify header information – headers already sent by (output started
   at /***_content/plugins/participants-database/classes/PDb_Init.class.php:158)
   in /***_content/plugins/participants-database/classes/WP_Session.class.php on
   line 123
 * thanks,
    jomaga
 * [https://wordpress.org/plugins/participants-database/](https://wordpress.org/plugins/participants-database/)

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

 *  Plugin Author [Roland Barker](https://wordpress.org/support/users/xnau/)
 * (@xnau)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/activate-the-plugin-generates-an-error/#post-6275686)
 * Yes, thanks….
 * I uploaded the fix, you can replace your classes/PDb_Init.class.php file with
   the one I just updated or you can fix it by adding this at line 128:
 * global $wpdb;
 * the updated file is at:
 * [http://plugins.svn.wordpress.org/participants-database/tags/1.6.0/classes/PDb_Init.class.php](http://plugins.svn.wordpress.org/participants-database/tags/1.6.0/classes/PDb_Init.class.php)
 *  Thread Starter [jomaga](https://wordpress.org/support/users/jomaga/)
 * (@jomaga)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/activate-the-plugin-generates-an-error/#post-6275829)
 * just fine, thank you 🙂

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

The topic ‘activate the plugin generates an error’ is closed to new replies.

 * ![](https://ps.w.org/participants-database/assets/icon-256x256.jpg?rev=1389807)
 * [Participants Database](https://wordpress.org/plugins/participants-database/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/participants-database/unresolved/)
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 * 2 replies
 * 2 participants
 * Last reply from: [jomaga](https://wordpress.org/support/users/jomaga/)
 * Last activity: [10 years, 11 months ago](https://wordpress.org/support/topic/activate-the-plugin-generates-an-error/#post-6275829)
 * Status: resolved