Title: [Plugin: HTML Emails] Breaks Debug Mode
Last modified: August 20, 2016

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# [Plugin: HTML Emails] Breaks Debug Mode

 *  [Pat Hawks](https://wordpress.org/support/users/pathawks/)
 * (@pathawks)
 * [14 years, 8 months ago](https://wordpress.org/support/topic/plugin-html-emails-breaks-debug-mode/)
 * In Debug mode, the plugin throws a couple of errors.
    This causes output to be
   sent before headers are sent, which just kind of screws things up.
 * > **Notice**: Use of undefined constant HTMLIZE_VERSION – assumed ‘HTMLIZE_VERSION’
   > in `/wp-content/plugins/html-emails/html-emails.php` on line **39**
   > **Notice**: Use of undefined constant HTMLIZE_BASE_TEMPLATE – assumed ‘HTMLIZE_BASE_TEMPLATE’
   > in `/wp-content/plugins/html-emails/html-emails.php` on line **40**
   > **Notice**: Use of undefined constant HTMLIZE_FOLDER – assumed ‘HTMLIZE_FOLDER’
   > in `/wp-content/plugins/html-emails/html-emails.php` on line **41**
   > **Notice**: Use of undefined constant HTMLIZE_PATH – assumed ‘HTMLIZE_PATH’
   > in `/wp-content/plugins/html-emails/html-emails.php` on line **42**
   > **Notice**: Use of undefined constant HTMLIZE_URL – assumed ‘HTMLIZE_URL’ in`/
   > wp-content/plugins/html-emails/html-emails.php` on line **43**
   > **Notice**: Use of undefined constant HTMLIZE_TEMPLATE_DIR – assumed ‘HTMLIZE_TEMPLATE_DIR’
   > in `/wp-content/plugins/html-emails/html-emails.php` on line **44**

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 * 0 replies
 * 1 participant
 * Last reply from: [Pat Hawks](https://wordpress.org/support/users/pathawks/)
 * Last activity: [14 years, 8 months ago](https://wordpress.org/support/topic/plugin-html-emails-breaks-debug-mode/)
 * Status: not resolved