Title: Error prevents activation
Last modified: August 21, 2016

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# Error prevents activation

 *  Resolved [kalligator](https://wordpress.org/support/users/kalligator/)
 * (@kalligator)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/)
 * `Fatal error: Call-time pass-by-reference has been removed in /wp-content/plugins/
   image-cleanup/image-cleanup.plugin.php on line 537`
 * If I take out `&` from `&$invalid_images` in the line the error is repeated for
   the next occurrence of `&$invalid_images`.
 * Running PHP Version 5.4.20
 * [http://wordpress.org/plugins/image-cleanup/](http://wordpress.org/plugins/image-cleanup/)

Viewing 8 replies - 1 through 8 (of 8 total)

 *  Plugin Author [opicron](https://wordpress.org/support/users/opicron/)
 * (@opicron)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/#post-4295535)
 * Thank you for the heads up. I will check this out right now!
 *  Plugin Author [opicron](https://wordpress.org/support/users/opicron/)
 * (@opicron)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/#post-4295542)
 * I have fixed the error which is thrown on php 5.4+. Thank you for pointing that
   out.
 * Also I have made some other usefull changes. Please check the readme changelog.
 * Would you be so kind to try out this version and let us know if it works for 
   you now?
 *  Thread Starter [kalligator](https://wordpress.org/support/users/kalligator/)
 * (@kalligator)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/#post-4295547)
 * That was fast!
    OK it seemed to have activated but it’s not shown under Tools.
 *  Plugin Author [opicron](https://wordpress.org/support/users/opicron/)
 * (@opicron)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/#post-4295548)
 * Mhmm that is very odd indeed. That piece of code should be functioning as it 
   is almost direct copy from the wikis ;).
 * Can I debug it on your site?
 *  Thread Starter [kalligator](https://wordpress.org/support/users/kalligator/)
 * (@kalligator)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/#post-4295549)
 * Sure, give me a contact email, I didn’t find any in the plugin description.
 * /update/
    ok noted, you can delete it if you wish.
 *  Plugin Author [opicron](https://wordpress.org/support/users/opicron/)
 * (@opicron)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/#post-4295551)
 * its opicron at gmail.com, thank you in advance!
 *  Plugin Author [opicron](https://wordpress.org/support/users/opicron/)
 * (@opicron)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/#post-4295554)
 * It seems that your website has at least 40.000 attachments. The plugin worked
   successfully up to 23.000 attachments. This means I will have to break up some
   ajax call into smaller portions.
 * I will rewrite part of the plugin to accomodate for extremely large image collections.
   Please allow me to contact you shortly (weekend).
 *  Plugin Author [opicron](https://wordpress.org/support/users/opicron/)
 * (@opicron)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/#post-4295591)
 * The plugin has finished indexing. Total uploaded media attachments 9999 (what
   a strange number). Total valid meta data entries 89965.
 * This was by far the largest dataset on which the plugin has run. Still the total
   index time is only about 30 seconds.

Viewing 8 replies - 1 through 8 (of 8 total)

The topic ‘Error prevents activation’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/image-cleanup_e2e2e2.svg)
 * [Image Cleanup](https://wordpress.org/plugins/image-cleanup/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/image-cleanup/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/image-cleanup/)
 * [Active Topics](https://wordpress.org/support/plugin/image-cleanup/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/image-cleanup/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/image-cleanup/reviews/)

 * 8 replies
 * 2 participants
 * Last reply from: [opicron](https://wordpress.org/support/users/opicron/)
 * Last activity: [12 years, 8 months ago](https://wordpress.org/support/topic/error-prevents-activation/#post-4295591)
 * Status: resolved