Title: Multisite network activation
Last modified: August 20, 2016

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# Multisite network activation

 *  Resolved [Catapult](https://wordpress.org/support/users/catapult/)
 * (@catapult)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/multisite-network-activation/)
 * Hi
 * WP 3.5.1 and Attachments 3.3.3
 * Theme: TwentyTwelve
 * No other plug-ins activated
 * On a multisite installation, selecting Network Activate for the plugin generates
   these errors:
 *     ```
       Warning: Invalid argument supplied for foreach() in /home/xxxxxx/public_html/wp-includes/query.php on line 1702
   
       Warning: Invalid argument supplied for foreach() in /home/xxxxxx/public_html/wp-includes/query.php on line 1702
   
       Warning: Cannot modify header information - headers already sent by (output started at /home/xxxxxx/public_html/wp-includes/query.php:1702) in /home/xxxxxx/public_html/wp-includes/option.php on line 568
   
       Warning: Cannot modify header information - headers already sent by (output started at /home/xxxxxx/public_html/wp-includes/query.php:1702) in /home/xxxxxx/public_html/wp-includes/option.php on line 569
       ```
   
 * Deactivating the plug-in on the network and instead activating per blog doesn’t
   generate any errors.
 * Moreover, with the plug-in network activated, attempting to access /wp-admin 
   produced these errors and I had to remove the plug-in via FTP in order to gain
   access to the admin:
 *     ```
       Warning: Invalid argument supplied for foreach() in /home/xxxxxx/public_html/wp-includes/query.php on line 1702
   
       Warning: Invalid argument supplied for foreach() in /home/xxxxxx/public_html/wp-includes/query.php on line 1702
   
       Warning: Cannot modify header information - headers already sent by (output started at /home/xxxxxx/public_html/wp-includes/query.php:1702) in /home/xxxxxx/public_html/wp-includes/pluggable.php on line 876
       ```
   
 * I realise from other threads on this forum that you haven’t been able to replicate
   similar errors. I’m happy to give you a log-in if required.
 * [http://wordpress.org/extend/plugins/attachments/](http://wordpress.org/extend/plugins/attachments/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [Jon Christopher](https://wordpress.org/support/users/jchristopher/)
 * (@jchristopher)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/multisite-network-activation/#post-3504509)
 * This is a repost of [this thread](http://wordpress.org/support/topic/attachments-in-wordpress-multisite)
   so I’ve marked that one as unresolved and we’ll continue there so as to not deal
   with dupe support requests, thank you.
 * EDIT: Actually no, it’s a different support request so this will remain open.
   I’ll take a look as soon as I can but am currently slammed busy with client work
   so I’m open to [pull requests](https://github.com/jchristopher/attachments/pulls).
 *  [Kat Clark](https://wordpress.org/support/users/kat-hello/)
 * (@kat-hello)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/multisite-network-activation/#post-3504535)
 * I have the same issue using Attachments 3.3 and WordPress MU (with or without
   other plugins activated). If the plugin is activated per blog rather than across
   the whole network it gives errors when uploading / selecting files. Would love
   some help with this 🙂
 *  Plugin Author [Jon Christopher](https://wordpress.org/support/users/jchristopher/)
 * (@jchristopher)
 * [13 years, 2 months ago](https://wordpress.org/support/topic/multisite-network-activation/#post-3504597)
 * This issue has been resolved in version 3.4, thank you for the reports!

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Multisite network activation’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/attachments_fafafa.svg)
 * [Attachments](https://wordpress.org/plugins/attachments/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/attachments/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/attachments/)
 * [Active Topics](https://wordpress.org/support/plugin/attachments/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/attachments/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/attachments/reviews/)

 * 3 replies
 * 3 participants
 * Last reply from: [Jon Christopher](https://wordpress.org/support/users/jchristopher/)
 * Last activity: [13 years, 2 months ago](https://wordpress.org/support/topic/multisite-network-activation/#post-3504597)
 * Status: resolved