Title: [Plugin: NextGEN Gallery] Issue with thumbnails
Last modified: August 20, 2016

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# [Plugin: NextGEN Gallery] Issue with thumbnails

 *  [christian70](https://wordpress.org/support/users/christian70/)
 * (@christian70)
 * [14 years, 1 month ago](https://wordpress.org/support/topic/plugin-nextgen-gallery-issue-with-thumbnails/)
 * HI. thanx for the plugin, it’s fantastic (or it is expected to be). it works 
   perfectly in appearance (i can load pictures, thumbnail are phisically created
   in their folder, and it’s properly integrated with monoslideshow that i use for
   galleries to show). but i can’t manage with thumbnails: some disapperead from
   manager gallery window (althoug i see them in the folder), and when i try to 
   use them in a post these warnings appears:
    ”Warning: imagecreatetruecolor() [
   function.imagecreatetruecolor]: Invalid image dimensions in xxx\wp-content\plugins\
   nextgen-gallery\lib\gd.thumbnail.inc.php on line 555” ”Warning: imagecopyresampled():
   supplied argument is not a valid Image resource in xxx\wp-content\plugins\nextgen-
   gallery\lib\gd.thumbnail.inc.php on line 940” … i red so much on old topics but
   nothing seems to fix that. any idea would be pleased. thanks.
 * [http://wordpress.org/extend/plugins/nextgen-gallery/](http://wordpress.org/extend/plugins/nextgen-gallery/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [micharo](https://wordpress.org/support/users/micharo/)
 * (@micharo)
 * [13 years, 10 months ago](https://wordpress.org/support/topic/plugin-nextgen-gallery-issue-with-thumbnails/#post-2699861)
 * Hi, I have very similar problems!
 * Help appreciated!
 * Warning: imagecreatetruecolor() [function.imagecreatetruecolor]: Invalid image
   dimensions in xxxx/wp-includes/media.php on line 1025
 * Warning: imagecopyresampled() expects parameter 1 to be resource, boolean given
   in xxxx/wp-includes/media.php on line 435
 * Warning: imagejpeg() expects parameter 1 to be resource, boolean given in xxxx/
   wp-includes/media.php on line 467
    607
 *  [capodieci](https://wordpress.org/support/users/capodieci/)
 * (@capodieci)
 * [13 years, 5 months ago](https://wordpress.org/support/topic/plugin-nextgen-gallery-issue-with-thumbnails/#post-2699877)
 * I have thumbnails generation problem using with WordPress 3.5 and NextGen Gallery
   1.9.9
 * I have a WPMU installation (I manage many websites with a single wordpress installation)
   and I have thumbnail generation problem only in some websites. I did try to deactivate
   all the plugins, but the problem persists. The only thing that changes from one
   website to the other is the theme, and I did try to switch the theme with the
   standard theme, but no difference.
 * The only problem that affect all the websites is the visualization of an image
   using
    websiteexample.com/wp-content/plugins/nextgen-gallery/nggshow.php?pid=
   3&width=350&height=350 as this return a broken image. This affects, for example
   the possibility to edit a thumbnail (as the image on the left, in the dialog,
   does not appears). I did extensive search, but I found no solution.
 * Regarding the generation of the thumbnails I get the error “A failure occurred”
   and pressing on “more” i read “Error: Create image failed. Check Safe Mode settings”.
   It cannot be the safe mode, as php.ini affects all the websites, and not just
   some. I searched about this, but found nothing.
 * Looking at the error logs of my web server I found this:
    ”Warning: imagecreatetruecolor():
   Invalid image dimensions in xxx\wp-content\plugins\nextgen-gallery\lib\gd.thumbnail.
   inc.php on line 555” and ”Warning: imagecopyresampled(): supplied argument is
   not a valid Image resource in xxx\wp-content\plugins\nextgen-gallery\lib\gd.thumbnail.
   inc.php on line 940”
 * Anyone has some idea on how to solve this problem?

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘[Plugin: NextGEN Gallery] Issue with thumbnails’ is closed to new replies.

 * ![](https://ps.w.org/nextgen-gallery/assets/icon-256x256.png?rev=2083961)
 * [Photo Gallery, Sliders, Proofing and Themes - NextGEN Gallery](https://wordpress.org/plugins/nextgen-gallery/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/nextgen-gallery/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/nextgen-gallery/)
 * [Active Topics](https://wordpress.org/support/plugin/nextgen-gallery/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/nextgen-gallery/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/nextgen-gallery/reviews/)

 * 2 replies
 * 3 participants
 * Last reply from: [capodieci](https://wordpress.org/support/users/capodieci/)
 * Last activity: [13 years, 5 months ago](https://wordpress.org/support/topic/plugin-nextgen-gallery-issue-with-thumbnails/#post-2699877)
 * Status: not resolved