Title: [Plugin: BackWPup] Multisite error in Version: 1.1.0
Last modified: August 19, 2016

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# [Plugin: BackWPup] Multisite error in Version: 1.1.0

 *  Resolved [kokopelli](https://wordpress.org/support/users/kokopelli/)
 * (@kokopelli)
 * [15 years, 11 months ago](https://wordpress.org/support/topic/plugin-backwpup-multisite-error-in-version-110/)
 * Just upgraded to backWPup version 1.1.0 and now I’m getting this error in the
   job backend:
    `Fatal error: Call to undefined function is_multisite() in /home/
   mysite/public_html/wp-content/plugins/backwpup/app/functions.php on line 578`
 * I’m still on WP 2.9.2. so this looks like an error related to the new multi-site
   feature in WP 3.0. Is v1.1.0 of backWPup only compatible with WordPress 3.0 and
   up?
 * Thanks.
 * [http://wordpress.org/extend/plugins/backwpup/](http://wordpress.org/extend/plugins/backwpup/)

Viewing 1 replies (of 1 total)

 *  Plugin Contributor [Daniel Hüsken](https://wordpress.org/support/users/danielhuesken/)
 * (@danielhuesken)
 * [15 years, 11 months ago](https://wordpress.org/support/topic/plugin-backwpup-multisite-error-in-version-110/#post-1584504)
 * will fix it in next release. tumorrow…

Viewing 1 replies (of 1 total)

The topic ‘[Plugin: BackWPup] Multisite error in Version: 1.1.0’ is closed to new
replies.

 * ![](https://ps.w.org/backwpup/assets/icon-256x256.png?rev=3236141)
 * [BackWPup – WordPress Backup & Restore Plugin](https://wordpress.org/plugins/backwpup/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/backwpup/unresolved/)
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 * 1 reply
 * 2 participants
 * Last reply from: [Daniel Hüsken](https://wordpress.org/support/users/danielhuesken/)
 * Last activity: [15 years, 11 months ago](https://wordpress.org/support/topic/plugin-backwpup-multisite-error-in-version-110/#post-1584504)
 * Status: resolved