Title: Invalid Argument acf-functions.php Last modified: February 6, 2017 --- # Invalid Argument acf-functions.php * Resolved [Adicto](https://wordpress.org/support/users/adicto/) * (@adicto) * [9 years, 4 months ago](https://wordpress.org/support/topic/invalid-argument-acf-functions-php/) * Hi, just added your Plugin to a new Multisite. When I try to duplicate a page( or post), I always get this error message: * Warning: Invalid argument supplied for foreach() in /nhldata/749/156749/data/ web/web01/htdocs/wp-content/plugins/multisite-post-duplicator/inc/acf-functions. php on line 80 * Warning: Invalid argument supplied for foreach() in /nhldata/749/156749/data/ web/web01/htdocs/wp-content/plugins/multisite-post-duplicator/inc/acf-functions. php on line 179 * Warning: Invalid argument supplied for foreach() in /nhldata/749/156749/data/ web/web01/htdocs/wp-content/plugins/multisite-post-duplicator/inc/acf-functions. php on line 80 * Warning: Invalid argument supplied for foreach() in /nhldata/749/156749/data/ web/web01/htdocs/wp-content/plugins/multisite-post-duplicator/inc/acf-functions. php on line 179 * Warning: Cannot modify header information – headers already sent by (output started at /nhldata/749/156749/data/web/web01/htdocs/wp-content/plugins/multisite-post- duplicator/inc/acf-functions.php:80) in /nhldata/749/156749/data/web/web01/htdocs/ wp-admin/post.php on line 197 * Warning: Cannot modify header information – headers already sent by (output started at /nhldata/749/156749/data/web/web01/htdocs/wp-content/plugins/multisite-post- duplicator/inc/acf-functions.php:80) in /nhldata/749/156749/data/web/web01/htdocs/ wp-includes/pluggable.php on line 1179 * The posts/pages will be duplicated and the linking seems to work too. But on every change (edit/delete) I always get this error. As long it’s working it wouldn’t be such a big problem for me, but our customer wanted it to be fixed. Do you have an idea what it could be, or how to resolve it? * We are using ACF Pro Fields for all Posts/Pages on the site… * Thank you in advance, Christian. Viewing 6 replies - 1 through 6 (of 6 total) * Plugin Author [MagicStick](https://wordpress.org/support/users/magicstick/) * (@magicstick) * [9 years, 4 months ago](https://wordpress.org/support/topic/invalid-argument-acf-functions-php/#post-8742808) * Hi Adicto. I’ll get a fix out for this tonight. Sorry about that. * Thread Starter [Adicto](https://wordpress.org/support/users/adicto/) * (@adicto) * [9 years, 4 months ago](https://wordpress.org/support/topic/invalid-argument-acf-functions-php/#post-8742869) * Hey MagicStick – you are a machine! Thank you very much!! * Plugin Author [MagicStick](https://wordpress.org/support/users/magicstick/) * (@magicstick) * [9 years, 4 months ago](https://wordpress.org/support/topic/invalid-argument-acf-functions-php/#post-8745506) * Just committed v1.5.3 Adicto. Should be fixed now. Please report back if not! * Thread Starter [Adicto](https://wordpress.org/support/users/adicto/) * (@adicto) * [9 years, 4 months ago](https://wordpress.org/support/topic/invalid-argument-acf-functions-php/#post-8745579) * Hi MagicStick, thank you very, very much! Just made the update an the error-message… changed. It’s not yet gone, this time it’s another line that causes the error. I’m so sorry. * Warning: Invalid argument supplied for foreach() in /nhldata/749/156749/data/ web/web01/htdocs/wp-content/plugins/multisite-post-duplicator/inc/acf-functions. php on line 191 * Warning: Invalid argument supplied for foreach() in /nhldata/749/156749/data/ web/web01/htdocs/wp-content/plugins/multisite-post-duplicator/inc/acf-functions. php on line 191 * Warning: Invalid argument supplied for foreach() in /nhldata/749/156749/data/ web/web01/htdocs/wp-content/plugins/multisite-post-duplicator/inc/acf-functions. php on line 191 * Warning: Invalid argument supplied for foreach() in /nhldata/749/156749/data/ web/web01/htdocs/wp-content/plugins/multisite-post-duplicator/inc/acf-functions. php on line 191 * Warning: Cannot modify header information – headers already sent by (output started at /nhldata/749/156749/data/web/web01/htdocs/wp-content/plugins/multisite-post- duplicator/inc/acf-functions.php:191) in /nhldata/749/156749/data/web/web01/htdocs/ wp-admin/post.php on line 197 * Warning: Cannot modify header information – headers already sent by (output started at /nhldata/749/156749/data/web/web01/htdocs/wp-content/plugins/multisite-post- duplicator/inc/acf-functions.php:191) in /nhldata/749/156749/data/web/web01/htdocs/ wp-includes/pluggable.php on line 1179 * Hopefully it’s not a tricky thing to fix! Thank you in advance, Christian. * Plugin Author [MagicStick](https://wordpress.org/support/users/magicstick/) * (@magicstick) * [9 years, 4 months ago](https://wordpress.org/support/topic/invalid-argument-acf-functions-php/#post-8755684) * And another commit tonight Adicto! Should be fixed now! * Thread Starter [Adicto](https://wordpress.org/support/users/adicto/) * (@adicto) * [9 years, 4 months ago](https://wordpress.org/support/topic/invalid-argument-acf-functions-php/#post-8758194) * Hey MagicStick – you did it! No more errors, works like a charm! Thank you very much + all the best, Christian Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘Invalid Argument acf-functions.php’ is closed to new replies. * ![](https://ps.w.org/multisite-post-duplicator/assets/icon-128x128.png?rev=1562920) * [Multisite Post Duplicator](https://wordpress.org/plugins/multisite-post-duplicator/) * [Frequently Asked Questions](https://wordpress.org/plugins/multisite-post-duplicator/#faq) * [Support Threads](https://wordpress.org/support/plugin/multisite-post-duplicator/) * [Active Topics](https://wordpress.org/support/plugin/multisite-post-duplicator/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/multisite-post-duplicator/unresolved/) * [Reviews](https://wordpress.org/support/plugin/multisite-post-duplicator/reviews/) * 6 replies * 2 participants * Last reply from: [Adicto](https://wordpress.org/support/users/adicto/) * Last activity: [9 years, 4 months ago](https://wordpress.org/support/topic/invalid-argument-acf-functions-php/#post-8758194) * Status: resolved