Title: Version compatibility
Last modified: April 10, 2017

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# Version compatibility

 *  [qoalu](https://wordpress.org/support/users/qoalu/)
 * (@qoalu)
 * [9 years, 2 months ago](https://wordpress.org/support/topic/version-compatibility-5/)
 * Hi,
 * I just want to point out that there should be version compatibility included 
   depending on version of WP. I just updated the theme being on 4.6.3 and the site(
   both frontend and backend) started throwing an error.
 * The problem was that wp_update_custom_css_post() was introduced in 4.7.0
    [https://developer.wordpress.org/reference/functions/wp_update_custom_css_post/](https://developer.wordpress.org/reference/functions/wp_update_custom_css_post/)
 * I had to fiddle with files through ftp to get the site back up.
    I know this 
   is a thing with plugins to have compatibility information. Definitely also useful
   for themes.
    -  This topic was modified 9 years, 2 months ago by [qoalu](https://wordpress.org/support/users/qoalu/).

The topic ‘Version compatibility’ is closed to new replies.

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## Tags

 * [compatibility](https://wordpress.org/support/topic-tag/compatibility/)
 * [update](https://wordpress.org/support/topic-tag/update/)

 * 0 replies
 * 1 participant
 * Last reply from: [qoalu](https://wordpress.org/support/users/qoalu/)
 * Last activity: [9 years, 2 months ago](https://wordpress.org/support/topic/version-compatibility-5/)
 * Status: not a support question