Title: Compilation Error
Last modified: August 21, 2016

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# Compilation Error

 *  [julzdawson](https://wordpress.org/support/users/julzdawson/)
 * (@julzdawson)
 * [12 years, 3 months ago](https://wordpress.org/support/topic/compilation-error/)
 * I get the following compilation warning/error:
 * Warning: preg_match() [function.preg-match]: Compilation failed: unrecognized
   character after (?< at offset 19 in /web1/user48826/website/wp-content/plugins/
   nextgen-gallery/products/photocrati_nextgen/modules/router/mixin.url_manipulation.
   php on line 161
 * Using WordPress (3.8.1) and NextGen Gallery (2.0.40) on a site running a customized
   version of the theme Restaurateur (2.0.5)
 * The warning is thrown when moving between thumbnail and slide views of a gallery.
 * Anyone got ideas about what is causing this and how I can get rid of it?
 * Julz
 * [http://wordpress.org/plugins/nextgen-gallery/](http://wordpress.org/plugins/nextgen-gallery/)

The topic ‘Compilation Error’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [julzdawson](https://wordpress.org/support/users/julzdawson/)
 * Last activity: [12 years, 3 months ago](https://wordpress.org/support/topic/compilation-error/)
 * Status: not resolved