Title: Type: PHP Warning error
Last modified: September 6, 2022

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# Type: PHP Warning error

 *  Resolved [fondashci](https://wordpress.org/support/users/fondashci/)
 * (@fondashci)
 * [3 years, 8 months ago](https://wordpress.org/support/topic/type-php-warning-error/)
 * Message: Undefined array key 2
    In: /public_html/wp-admin/includes/menu.php on
   line 174
 *  thrown in /public_html/wp-content/plugins/multi-order-for-woocommerce/classes/
   multiorder/class-alg-mowc-order-manager.php on line 114
 * any idea why i have that error ?

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

 *  Thread Starter [fondashci](https://wordpress.org/support/users/fondashci/)
 * (@fondashci)
 * [3 years, 8 months ago](https://wordpress.org/support/topic/type-php-warning-error/#post-15983965)
 * Type: PHP Fatal error
    Message: Uncaught Error: Call to undefined method WC_PIP_Document_Invoice::
   get_id() In: /public_html/wp-content/plugins/multi-order-for-woocommerce/classes/
   multiorder/class-alg-mowc-order-manager.php:114
 *  Plugin Support [MeganSupport](https://wordpress.org/support/users/megan891/)
 * (@megan891)
 * [3 years, 8 months ago](https://wordpress.org/support/topic/type-php-warning-error/#post-15987589)
 * Hi [@fondashci](https://wordpress.org/support/users/fondashci/)
 * Sorry you’re having trouble. Please note that for queries like this a support
   ticket needs to be logged via our website here [https://wpwham.com/support](https://wpwham.com/support)
   so that we can assist you further.
 * Thanks in advance,
    WP Wham Support

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

The topic ‘Type: PHP Warning error’ is closed to new replies.

 * ![](https://ps.w.org/multi-order-for-woocommerce/assets/icon-256x256.png?rev=
   1767044)
 * [Multi Order for WooCommerce](https://wordpress.org/plugins/multi-order-for-woocommerce/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/multi-order-for-woocommerce/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/multi-order-for-woocommerce/)
 * [Active Topics](https://wordpress.org/support/plugin/multi-order-for-woocommerce/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/multi-order-for-woocommerce/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/multi-order-for-woocommerce/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [MeganSupport](https://wordpress.org/support/users/megan891/)
 * Last activity: [3 years, 8 months ago](https://wordpress.org/support/topic/type-php-warning-error/#post-15987589)
 * Status: resolved