Title: Warning:array_merge Last modified: August 22, 2016 --- # Warning:array_merge * Resolved [kevinthompson](https://wordpress.org/support/users/kevinthompson/) * (@kevinthompson) * [11 years, 4 months ago](https://wordpress.org/support/topic/warningarray_merge/) * Hi, * I just upgraded the plugin and am getting this error: * Warning: array_merge() [function.array-merge]: Argument #2 is not an array in/ home/madbiddi/public_html/thebookcoverdesigner.com/wp-content/plugins/woocommerce- mailchimp/classes/class-ss-wc-integration-mailchimp.php on line 172 * Any ideas? * [https://wordpress.org/plugins/woocommerce-mailchimp/](https://wordpress.org/plugins/woocommerce-mailchimp/) Viewing 11 replies - 1 through 11 (of 11 total) * [nicmare](https://wordpress.org/support/users/nicmare/) * (@nicmare) * [11 years, 4 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680350) * same problem here: Notice: Undefined variable: lists in /Users/nicb/Data/_htdocs/ bmw/wp/wp-content/plugins/woocommerce-mailchimp/classes/class-ss-wc-integration- mailchimp.php on line 172 * Warning: array_merge(): Argument #2 is not an array in /Users/nicb/Data/_htdocs/ bmw/wp/wp-content/plugins/woocommerce-mailchimp/classes/class-ss-wc-integration- mailchimp.php on line 172 * Warning: session_start(): Cannot send session cache limiter – headers already sent (output started at /Users/nicb/Data/_htdocs/bmw/wp/wp-content/plugins/woocommerce- mailchimp/classes/class-ss-wc-integration-mailchimp.php:172) * [eleganteye](https://wordpress.org/support/users/eleganteye/) * (@eleganteye) * [11 years, 4 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680387) * Warning: array_merge(): Argument #2 is not an array in /wordpress/wp-content/ plugins/woocommerce-mailchimp/classes/class-ss-wc-integration-mailchimp.php on line 172 * [ts743](https://wordpress.org/support/users/ts743/) * (@ts743) * [11 years, 4 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680423) * And me… * Warning: array_merge(): Argument #2 is not an array in /home/content/p3nexnas06_data01/ 61/2196161/html/wp-content/plugins/woocommerce-mailchimp/classes/class-ss-wc- integration-mailchimp.php on line 172 * [eleganteye](https://wordpress.org/support/users/eleganteye/) * (@eleganteye) * [11 years, 4 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680456) * This only happens on one of my sites. I’ve decided not to use Mailchimp there. But it may be a conflict with other plugins or a theme. * [RexAK](https://wordpress.org/support/users/rexak/) * (@rexak) * [11 years, 4 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680461) * Having the same issue. Replacing the plugin with the previous version fixed it for me…hopefully. * [boutzamat](https://wordpress.org/support/users/boutzamat/) * (@boutzamat) * [11 years, 4 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680468) * Warning: array_merge(): Argument #2 is not an array in * /wp-content/plugins/ woocommerce-mailchimp/classes/class-ss-wc-integration-mailchimp.php on line 172… * [jonathanmotes](https://wordpress.org/support/users/jonathanmotes/) * (@jonathanmotes) * [11 years, 4 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680518) * Experiencing same problem here. Also still getting a headers already sent error, making it difficult to access the WP-Admin. Had to disable it for now. * Plugin Author [Adam Anderly](https://wordpress.org/support/users/anderly/) * (@anderly) * [11 years, 4 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680533) * This problem should be fixed in the latest version (1.3.5). * [boutzamat](https://wordpress.org/support/users/boutzamat/) * (@boutzamat) * [10 years, 9 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680565) * This problem still persists in the latest version… * supplied for foreach() in /*******/wp-content/plugins/woocommerce-mailchimp/classes/ class-ss-wc-integration-mailchimp.php on line 358 * ***** are the path to root – not specified public for security reasons.. * [maxmillionmusic](https://wordpress.org/support/users/maxmillionmusic/) * (@maxmillionmusic) * [10 years, 8 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680566) * Same here. * /wp-content/plugins/woocommerce-mailchimp/classes/class-ss-wc-integration-mailchimp. php on line 358 * Any info? * Plugin Author [Adam Anderly](https://wordpress.org/support/users/anderly/) * (@anderly) * [10 years, 8 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680567) * This means there was an issue retrieving your MailChimp lists. Please verify your api key and that you have lists in MailChimp. I just tested the current version (1.3.6) with WordPress 4.3.1 and it is working. * Please let me know if you still have any issues. * Adam Viewing 11 replies - 1 through 11 (of 11 total) The topic ‘Warning:array_merge’ is closed to new replies. * ![](https://ps.w.org/woocommerce-mailchimp/assets/icon.svg?rev=1495270) * [WP WooCommerce Mailchimp](https://wordpress.org/plugins/woocommerce-mailchimp/) * [Support Threads](https://wordpress.org/support/plugin/woocommerce-mailchimp/) * [Active Topics](https://wordpress.org/support/plugin/woocommerce-mailchimp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce-mailchimp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/woocommerce-mailchimp/reviews/) ## Tags * [array_merge](https://wordpress.org/support/topic-tag/array_merge/) * [classes](https://wordpress.org/support/topic-tag/classes/) * [warning](https://wordpress.org/support/topic-tag/warning/) * 11 replies * 9 participants * Last reply from: [Adam Anderly](https://wordpress.org/support/users/anderly/) * Last activity: [10 years, 8 months ago](https://wordpress.org/support/topic/warningarray_merge/#post-5680567) * Status: resolved