Title: Cannot Generate New Thumbnails Last modified: August 22, 2016 --- # Cannot Generate New Thumbnails * [Kevin Muldoon](https://wordpress.org/support/users/kevin-muldoon/) * (@kevin-muldoon) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/) * I am trying to resolve an issue with thumbnails not generating. * The issue can be seen at [http://www.paramountconstruction.net/bethesda-builder-homes-portfolio](http://www.paramountconstruction.net/bethesda-builder-homes-portfolio). * Some thumbnails are being displayed, some are not, however full size images can still be viewed if you click on the broken thumbnail image. * The bizarre thing is that in the “Manage Galleries” section, each album is correctly displaying thumbnails. * Unfortunately, I am unable to create new thumbnails. I get an error every time, whether I attempt to create a new thumbnail for one gallery or for multiple galleries. * Below is some of the errors that are generated. * Warning: getimagesize(/../portfolio/tracy/tracy2.jpg) [function.getimagesize]: failed to open stream: No such file or directory in /…/wp-content/plugins/nextgen- gallery/products/photocrati_nextgen/modules/nextgen_data/package.module.nextgen_data. php on line 1545 * Warning: Cannot modify header information – headers already sent by (output started at /…/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/ nextgen_data/package.module.nextgen_data.php:1545) in /…/wp-content/plugins/nextgen- gallery/products/photocrati_nextgen/modules/frame_communication/package.module. frame_communication.php on line 65 Error while creating thumbnail. * Does anyone know what could be causing this? * Thanks, Kevin * [https://wordpress.org/plugins/nextgen-gallery/](https://wordpress.org/plugins/nextgen-gallery/) Viewing 13 replies - 1 through 13 (of 13 total) * Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/) * (@photocrati) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863501) * [@kevin](https://wordpress.org/support/users/kevin/) Muldoon – Have you tried the troubleshooting steps found in this article: [http://codex.wordpress.org/Managing_Plugins#Troubleshooting](http://codex.wordpress.org/Managing_Plugins#Troubleshooting) * – Cais. * Thread Starter [Kevin Muldoon](https://wordpress.org/support/users/kevin-muldoon/) * (@kevin-muldoon) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863510) * Hi Cais. * Yes I have. We deactivated all plugins and then reactivated NextGen. There is no conflicts with the theme either as we tested the issue with the default WordPress themes. * What could be causing this. * Kevin * Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/) * (@photocrati) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863548) * [@kevin](https://wordpress.org/support/users/kevin/) Muldoon – So you are getting the exact same errors with a default WordPress Twenty series theme and only NextGEN Gallery active? * Did you try also deactivating, deleting, and re-installing and re-activating NextGEN Gallery as well? * – Cais. * Thread Starter [Kevin Muldoon](https://wordpress.org/support/users/kevin-muldoon/) * (@kevin-muldoon) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863555) * I have been reluctant to delete the plugin and reinstall it as I assumed that NextGen would also remove all data. * Can you confirm that if I uninstall the plugin and reinstall it, all data will remain and all shortcodes etc will remain the same. * Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/) * (@photocrati) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863561) * [@kevin](https://wordpress.org/support/users/kevin/) Muldoon – All of your images and galleries will be safe. Deactivating and deleting is much the same process that WordPress itself uses to do updates. * – Cais. * Thread Starter [Kevin Muldoon](https://wordpress.org/support/users/kevin-muldoon/) * (@kevin-muldoon) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863562) * Are you 100% sure of this? * When I try and delete the plugin, WordPress states: * > You are about to remove the following plugin: > NextGEN Gallery by Photocrati by Photocrati Media (will also delete its data) > > Are you sure you wish to delete these files and data? * This states that all data will be deleted. * Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/) * (@photocrati) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863584) * [@kevin](https://wordpress.org/support/users/kevin/) Muldoon – I do it all the time on my test sites without issue. NextGEN Gallery will not remove the images, galleries, albums, etc. when you deactivate, delete, re-install and re-activate it using the WordPress Plugins interface. * Thanks! * – Cais. * Thread Starter [Kevin Muldoon](https://wordpress.org/support/users/kevin-muldoon/) * (@kevin-muldoon) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863596) * Hi Cais. * I deactivated NextGen. Deleted the plugin. Reinstalled it. Activated it. * I then tried to generate new thumbnails and I got the same errors as before. * Is there a way to contact you privately with some login information so that you can quickly check the issue and see what is going wrong. * Thanks, Kevin * Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/) * (@photocrati) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863607) * [@kevin](https://wordpress.org/support/users/kevin/) Muldoon – You can send us a Bug Report with the necessary credentials. * Here is the link: [http://nextgen-gallery.com/report-bug/](http://nextgen-gallery.com/report-bug/) * Thanks! * – Cais. * Thread Starter [Kevin Muldoon](https://wordpress.org/support/users/kevin-muldoon/) * (@kevin-muldoon) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863612) * Thanks Cais. I have completed the bug report form. * Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/) * (@photocrati) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863624) * [@kevin](https://wordpress.org/support/users/kevin/) Muldoon – Thanks! I have responded to the Bug Report … let’s keep the conversation there for the time being. * – Cais. * Thread Starter [Kevin Muldoon](https://wordpress.org/support/users/kevin-muldoon/) * (@kevin-muldoon) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863625) * OK. Will do 🙂 * Plugin Contributor [photocrati](https://wordpress.org/support/users/photocrati/) * (@photocrati) * [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863626) * [@kevin](https://wordpress.org/support/users/kevin/) Muldoon – Thanks! * – Cais. Viewing 13 replies - 1 through 13 (of 13 total) The topic ‘Cannot Generate New 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/) ## Tags * [nextgen](https://wordpress.org/support/topic-tag/nextgen/) * 13 replies * 2 participants * Last reply from: [photocrati](https://wordpress.org/support/users/photocrati/) * Last activity: [11 years, 3 months ago](https://wordpress.org/support/topic/cannot-generate-new-thumbnails/#post-5863626) * Status: not resolved