Title: [Plugin: WP e-Commerce] Fatal Error add_query_var
Last modified: August 19, 2016

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# [Plugin: WP e-Commerce] Fatal Error add_query_var

 *  [vividlilac](https://wordpress.org/support/users/vividlilac/)
 * (@vividlilac)
 * [16 years, 4 months ago](https://wordpress.org/support/topic/plugin-wp-e-commerce-fatal-error-add_query_var/)
 * Hello, I recently upgraded my WP as well as WP e-Commerce and now I am receiving
   the following fatal error when the plugin is activated:
 * `Fatal error: Call to undefined method stdClass::add_query_var() in /wp-includes/
   taxonomy.`
 * I went through all of my installed plugins one by one to see if which one was
   causing the problems, and everything worked fine when this plugin was deactivated.
 * Does anyone have any ideas on how to fix this issue?
 * Thank you in advance for any help you can provide!
 * WP Version 2.9
    WP Shopping Cart Version 3.7.5.3
 * [http://wordpress.org/extend/plugins/wp-e-commerce/](http://wordpress.org/extend/plugins/wp-e-commerce/)

The topic ‘[Plugin: WP e-Commerce] Fatal Error add_query_var’ is closed to new replies.

 * 0 replies
 * 1 participant
 * Last reply from: [vividlilac](https://wordpress.org/support/users/vividlilac/)
 * Last activity: [16 years, 4 months ago](https://wordpress.org/support/topic/plugin-wp-e-commerce-fatal-error-add_query_var/)
 * Status: not resolved

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