Title: Compilation failed: unrecognized character (Errors)
Last modified: August 22, 2016

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# Compilation failed: unrecognized character (Errors)

 *  Resolved [sensarchux](https://wordpress.org/support/users/sensarchux/)
 * (@sensarchux)
 * [11 years, 3 months ago](https://wordpress.org/support/topic/compilation-failed-unrecognized-character-errors/)
 * I’m getting an endless stream of errors over and over at the top of my WordPress
   site when this plugin is installed. I have tried uninstalling and reinstalling
   and manually uploading and so on. Nothing is working and here is the error I’m
   getting at the top of my website.
 * Warning: preg_match_all() [function.preg-match-all]: Compilation failed: unrecognized
   character after (?< at offset 39 in /home/a3171176/public_html/wordpress/wp-content/
   plugins/popup-by-supsystic/modules/popup/mod.php on line 61
 * Warning: preg_match_all() [function.preg-match-all]: Compilation failed: unrecognized
   character after (?< at offset 23 in /home/a3171176/public_html/wordpress/wp-content/
   plugins/popup-by-supsystic/modules/popup/mod.php on line 62
 * And it continues on and on…pushing my website down.
 * Not to sure if this is useful information to you but ill list it anyway to help
   figure out this error. I’m a rook when it comes to all of this, but nothing ever
   seems to work right out of the box for me.
    — Running the latest version of WordPress
   Theme: Hueman (Popular Theme)(Perhaps the plugin is bugged on it?) Hosting server
   specs: Apache ver. 2.2.19 (Unix) PHP version 5.2.* MySQL ver. 5.1
 * [https://wordpress.org/plugins/popup-by-supsystic/](https://wordpress.org/plugins/popup-by-supsystic/)

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

 *  Thread Starter [sensarchux](https://wordpress.org/support/users/sensarchux/)
 * (@sensarchux)
 * [11 years, 3 months ago](https://wordpress.org/support/topic/compilation-failed-unrecognized-character-errors/#post-5926506)
 * Ah…my host is only allowing PHP: 5.2.17…So I suppose my situation is near hopeless
   unless you can somehow get it functioning on older PHP versions like mine. ;(
 * I’ll check back and cross my fingers for a silver lining of hope, but I won’t
   hold my breath. ;_;
 *  Plugin Author [supsystic](https://wordpress.org/support/users/supsysticcom/)
 * (@supsysticcom)
 * [11 years, 3 months ago](https://wordpress.org/support/topic/compilation-failed-unrecognized-character-errors/#post-5926587)
 * Hello.
    We are also tested this plugin with PHP 5.2 – and didn’t noticed such
   errors. Sure, we will try to reproduce and fix it for you. Can you please tell
   me – what PopUp template are you using when this happens? Maybe you can provide
   me with error page?
 *  Plugin Author [supsystic](https://wordpress.org/support/users/supsysticcom/)
 * (@supsysticcom)
 * [11 years, 3 months ago](https://wordpress.org/support/topic/compilation-failed-unrecognized-character-errors/#post-5926589)
 * Hello again.
    I think I found a fix, please contact us in our internal support
   system here [http://supsystic.com/contact-us/](http://supsystic.com/contact-us/)–
   and we will help you to resolve this issue.
 *  Plugin Author [supsystic](https://wordpress.org/support/users/supsysticcom/)
 * (@supsysticcom)
 * [11 years, 2 months ago](https://wordpress.org/support/topic/compilation-failed-unrecognized-character-errors/#post-5926797)
 * Hello.
    We just released new version of our plugin – that should fix your issue,
   in change log your issue was marked as: “Small issue fix – for servers with old
   version of pcre package (preg_match_all php warning)” So please check it – and
   let me know if issue will still persists.
 *  Plugin Author [supsystic](https://wordpress.org/support/users/supsysticcom/)
 * (@supsysticcom)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/compilation-failed-unrecognized-character-errors/#post-5926879)
 * Hi!
    Please tell me – has your problem been resolved?
 * Best regards,
    supsystic.team

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

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## Tags

 * [compilation failed](https://wordpress.org/support/topic-tag/compilation-failed/)

 * 5 replies
 * 2 participants
 * Last reply from: [supsystic](https://wordpress.org/support/users/supsysticcom/)
 * Last activity: [10 years, 11 months ago](https://wordpress.org/support/topic/compilation-failed-unrecognized-character-errors/#post-5926879)
 * Status: resolved