Title: Fatal Error
Last modified: February 7, 2018

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# Fatal Error

 *  Resolved [keithmorr](https://wordpress.org/support/users/keithmorr/)
 * (@keithmorr)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-2801/)
 * Plugin could not be activated because it triggered a fatal error.
 * Notice: Constant WC_POS_VERSION already defined in /home/XXXX/public_html/wp-
   content/plugins/woocommerce-pos/woocommerce-pos.php on line 31
 * Notice: Constant WC_POS_PLUGIN_FILE already defined in /home/XXXX/public_html/
   wp-content/plugins/woocommerce-pos/woocommerce-pos.php on line 33
 * Fatal error: Cannot declare class WC_POS_Admin_Notices, because the name is already
   in use in /home/XXXX/public_html/wp-content/plugins/woocommerce-pos/includes/
   admin/class-wc-pos-notices.php on line 13
 * So I cannot even test this plugin – Is there any support for this? If so I might
   try to track it down – If not does anyone have any recommendations for a POS 
   system to link to WooCommerce?
 * Thanks in advance!

Viewing 1 replies (of 1 total)

 *  Plugin Author [kilbot](https://wordpress.org/support/users/kilbot/)
 * (@kilbot)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-2801/#post-9954951)
 * Hi, it sounds like you have another point of sale plugin activated which uses
   some of the same class names. The plugin available on codecanyon [copied some code](https://codecanyon.net/item/woocommerce-point-of-sale-pos/7869665/comments?page=71&filter=all#comment_12456475)
   from WooCommerce POS a couple of years ago and this is known to cause problems.
   You will need to deactivate any other point of sale plugins before activating
   WooCommerce POS.

Viewing 1 replies (of 1 total)

The topic ‘Fatal Error’ is closed to new replies.

 * ![](https://ps.w.org/woocommerce-pos/assets/icon-256x256.png?rev=3109703)
 * [WCPOS - Point of Sale (POS) plugin for WooCommerce](https://wordpress.org/plugins/woocommerce-pos/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woocommerce-pos/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woocommerce-pos/)
 * [Active Topics](https://wordpress.org/support/plugin/woocommerce-pos/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce-pos/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woocommerce-pos/reviews/)

## Tags

 * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/)
 * [status](https://wordpress.org/support/topic-tag/status/)

 * 1 reply
 * 2 participants
 * Last reply from: [kilbot](https://wordpress.org/support/users/kilbot/)
 * Last activity: [8 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-2801/#post-9954951)
 * Status: resolved