Title: error when generating some thumbnails
Last modified: February 18, 2020

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# error when generating some thumbnails

 *  Resolved [Li-An](https://wordpress.org/support/users/li-an/)
 * (@li-an)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/error-when-generating-some-thumbnails/)
 * Hello, sorry for the late reply. I made some tests on my test site. Some thumbnails
   are generated but not all and errors are showing. See the link I give.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-when-generating-some-thumbnails%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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

 *  [qiuliu](https://wordpress.org/support/users/qiuliu/)
 * (@qiuliu)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/error-when-generating-some-thumbnails/#post-12465884)
 * Hi Li-An, it’s great you have a test site.
 * It looks some of your image files are missing. And I checked the Auto Smart Thumbnails
   code. It deletes only thumbnail files of the custom sizes and temporary files
   it generated when things go wrong. And all these deletions are logged if you 
   turn on the debug logging feature. This is the beauty of this plugin. I love 
   it.
 * As said, it won’t delete your original image files. To double check, you can 
   activate the plugin and check ‘Log debug info for troubleshooting’ in ‘Settings-
   > Auto Smart Thumbnails’. Leave the plugin activated and the setting on, and 
   then do your testing.
 * When there is info logged, you will see a button ‘Get Debug Log’ in ‘Tools ->
   Auto Smart Thumbnails’. You will see such log info:
 *  “#5 deleted size: $size, file: $file” (custom size and file name deleted)
 * Following image files are missing:
    2019/12/otto-nielsen-b-28.jpg 2019/05/Briggs-
   McCalls.jpg 2017/05/foodiesfeed.com_Your-Sunny-Side-Up-2.jpg 2017/05/25388788904_72d2f5ec6f_z.
   jpg 2015/04/images-doc-avril2015-couv.jpg 2018/08/a0334275141_10.jpg 2019/02/
   lais-ribeiro-by-zoey-grossman-for-fae-swim-spring-summer-2017-lookbook.21-1.jpg
 * But check the uploads/ast-backup/, your will find following files. These are 
   your original image files that the plugin saved when downsizing.
    2018/08/a0334275141_10.
   jpg 2019/02/lais-ribeiro-by-zoey-grossman-for-fae-swim-spring-summer-2017-lookbook.
   21-1.jpg (2.7M) 2018/12/avion-disparu-delamare-01.jpg (3.7M)
 * Fortunately, the result of downsizing of 2018/12/avion-disparu-delamare-01.jpg
   is still there (retest-pour-voir). The file was downsized from 3.7M (2204×2909)
   to 495K (1102×1455). That means the plugin was working.
 * It’s interesting to dig out why the missing files were gone. Can you restore 
   the files, turn on debugging and give it a shot? 🙂
 *  Thread Starter [Li-An](https://wordpress.org/support/users/li-an/)
 * (@li-an)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/error-when-generating-some-thumbnails/#post-12467403)
 * Thanks for your answer. I desactivated some plugins…and everything seems to work
   correctly. I will make some tests with a new theme I plan to use but it seems
   solved.
 *  [qiuliu](https://wordpress.org/support/users/qiuliu/)
 * (@qiuliu)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/error-when-generating-some-thumbnails/#post-12468505)
 * Awesome! My pleasure.

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

The topic ‘error when generating some thumbnails’ is closed to new replies.

 * ![](https://ps.w.org/auto-smart-thumbnails/assets/icon-256x256.jpg?rev=2219864)
 * [Auto Smart Thumbnails](https://wordpress.org/plugins/auto-smart-thumbnails/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/auto-smart-thumbnails/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/auto-smart-thumbnails/)
 * [Active Topics](https://wordpress.org/support/plugin/auto-smart-thumbnails/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/auto-smart-thumbnails/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/auto-smart-thumbnails/reviews/)

## Tags

 * [media library](https://wordpress.org/support/topic-tag/media-library/)
 * [thumbnails](https://wordpress.org/support/topic-tag/thumbnails/)

 * 3 replies
 * 2 participants
 * Last reply from: [qiuliu](https://wordpress.org/support/users/qiuliu/)
 * Last activity: [6 years, 1 month ago](https://wordpress.org/support/topic/error-when-generating-some-thumbnails/#post-12468505)
 * Status: resolved