Title: error message for "author"
Last modified: August 22, 2016

---

# error message for "author"

 *  Resolved [150d](https://wordpress.org/support/users/150d/)
 * (@150d)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/error-message-for-author/)
 * Hi,
 * since my update to WordPress v4.1 (and a corresponding update of NextGen) there
   are error messages displayed for most (but not all!) of my galleries:
 * In “manage galleries”, the list of galleries, in the column “author” there is:
 *     ```
       Notice: Trying to get property of non-object in /wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/ngglegacy/admin/manage-galleries.php on line 279
       ```
   
 * In single gallery view (where I can “edit” the gallery contents), in the area
   containing the gallery settings, there is also a field “author”. Here it says:
 *     ```
       Notice: Trying to get property of non-object in /wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/ngglegacy/admin/manage.php on line 526
       ```
   
 * In the debug log, there are additional messages (all of them multiple times:)
 *     ```
       [01-Jan-2015 00:20:04 UTC] PHP Notice:  Undefined index: image_id in /wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/nextgen_xmlrpc/module.nextgen_xmlrpc.php on line 257
   
       [01-Jan-2015 00:22:32 UTC] PHP Deprecated:  Non-static method nggdb::delete_image() should not be called statically, assuming $this from incompatible context in /wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/ngglegacy/admin/manage.php on line 699
   
       [01-Jan-2015 13:24:53 UTC] PHP Notice:  Undefined offset: 7 in /wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/nextgen_xmlrpc/module.nextgen_xmlrpc.php on line 622
   
       [01-Jan-2015 13:29:40 UTC] PHP Notice:  Undefined variable: ajax_nonce in /wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/ngglegacy/admin/media-upload.php on line 282
       ```
   
 * I only enabled the debug log recently (after the update) to track down some issues,
   so I can’t say for sure which of the messages in the log haven’t already been
   occuring before. The messages in the backend weren’t there before the update,
   though.
 * Regards
 * [https://wordpress.org/plugins/nextgen-gallery/](https://wordpress.org/plugins/nextgen-gallery/)

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/)
 * (@photocrati)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/error-message-for-author/#post-5626700)
 * [@150d](https://wordpress.org/support/users/150d/) – I would suggest starting
   with re-installing WordPress under Dashboard > Updates; and, re-installing NextGEN
   Gallery manually via an FTP client over-writing the existing folders and files
   under `../wp-content/plugins/nextgen-gallery/`
 * This looks more like a corrupted installation than anything else … although it
   could also be a plugin conflict.
 * – Cais.
 *  Thread Starter [150d](https://wordpress.org/support/users/150d/)
 * (@150d)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/error-message-for-author/#post-5626727)
 * Ok, I did both, without anything changing for the better. (For the plugin install,
   I simply switched the old for the new directory – there are no old files to keep,
   right?)
 * I just looked into the database. In table wp_ngg_gallery I found this:
 * The galleries that show the error have the field “author = x”.
    The galleries
   that do not show the error have “author = y”. (Not wanting to give away any secrets
   here, so let’s keep it at “x” and “y”… 🙂
 * This gave me an idea: The “bad” galleries are all old ones. For quite some time
   I’m using iThemes Security. One of its functions is to change user IDs for admin
   users. Could it be that “x” is the user ID before the change, and “y” is the 
   ID after the change? NextGen wouldn’t be able to locate any user “x”, that’s 
   why it shows an error.
 * Can I just modify the said records in the database “x”->”y” without side effects?
 * Regards
 *  Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/)
 * (@photocrati)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/error-message-for-author/#post-5626768)
 * [@150d](https://wordpress.org/support/users/150d/) – You may be onto the issue
   with something else (iThemes Security?) changing names. This would be a new issue
   created by that plugin if that is the case (or possibly an old one that is now
   being well described?).
 * If you have a fully verified complete back-up of your database (and site) then
   you could attempt to change the author names as you are suggesting but this is
   not something we could guarantee will correct the issue although it does stand
   to reason it could.
 * Please let us know how you fare with it.
 * Thanks!
 * – Cais.
 *  Thread Starter [150d](https://wordpress.org/support/users/150d/)
 * (@150d)
 * [11 years, 4 months ago](https://wordpress.org/support/topic/error-message-for-author/#post-5626856)
 * I made the change (update user ID in the database) a few weeks ago. The display
   was fine afterwards, and so far there have been no further problems.
 * Fixed. 🙂
 * Regards
 *  Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/)
 * (@photocrati)
 * [11 years, 4 months ago](https://wordpress.org/support/topic/error-message-for-author/#post-5626857)
 * [@150d](https://wordpress.org/support/users/150d/) – Thanks for the update.
 * – Cais.

Viewing 5 replies - 1 through 5 (of 5 total)

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 * 5 replies
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 * Last reply from: [photocrati](https://wordpress.org/support/users/photocrati/)
 * Last activity: [11 years, 4 months ago](https://wordpress.org/support/topic/error-message-for-author/#post-5626857)
 * Status: resolved