Title: teammonocode's Replies | WordPress.org

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# teammonocode

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## Forum Replies Created

Viewing 1 replies (of 1 total)

 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[PDF Invoices & Packing Slips for WooCommerce] Undefined function WPO\IPS\EDI\woocommerce_register_additional_checkout_field](https://wordpress.org/support/topic/undefined-function-wpoipsediwoocommerce_register_additional_checkout_field/)
 *  Thread Starter [teammonocode](https://wordpress.org/support/users/teammonocode/)
 * (@teammonocode)
 * [4 months ago](https://wordpress.org/support/topic/undefined-function-wpoipsediwoocommerce_register_additional_checkout_field/#post-18876802)
 * Hi [@alexmigf](https://wordpress.org/support/users/alexmigf/)
 * Thank you for sharing the pre-release version with us.
   Unfortunately this version
   throws the same error.We also noticed you’re still working on this issue:Commit
   deb6a3c from yesterday: [https://github.com/wpovernight/woocommerce-pdf-invoices-packing-slips/commit/deb6a3ce05d5ed86bd8fbfd4a2847d0f25518159](https://github.com/wpovernight/woocommerce-pdf-invoices-packing-slips/commit/deb6a3ce05d5ed86bd8fbfd4a2847d0f25518159)
 * Can we suggest something to check?
   We think the issue might be related to the
   WooCommerce versions you are supporting.According to the comment block in the
   main plugin file, you support WooCommerce 3.3 or newer.
 *     ```wp-block-code
       WC requires at least: 3.3
       ```
   
 * We are using WooCommerce version 4.5.3
 * It looks like the woocommerce_register_additional_checkout_field function is 
   not yet available in these versions.
   There might be an older related function
   you could use, we don’t know that.If not, you might consider to bump the minimum
   WooCommerce version for this project.
 * Maybe we’re completely wrong, but we thought it is worth checking out.
   Thanks!

Viewing 1 replies (of 1 total)