Title: Error with Mpdf\MpdfException
Last modified: December 24, 2019

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# Error with Mpdf\MpdfException

 *  [wortep](https://wordpress.org/support/users/wortep/)
 * (@wortep)
 * [6 years, 4 months ago](https://wordpress.org/support/topic/error-with-mpdfmpdfexception/)
 * Hi There!
 * After add a plugin, we have an error:
 * Have u any idea, why he not working ?
 * `Fatal error: Uncaught Mpdf\MpdfException: Data has already been sent to output,
   unable to output PDF file in /var/www/html/wp-content/plugins/wc-cart-pdf/vendor/
   mpdf/mpdf/src/Mpdf.php:9443 Stack trace: #0 /var/www/html/wp-content/plugins/
   wc-cart-pdf/wc-cart-pdf.php(109): Mpdf\Mpdf->Output('WC_Cart-2019122...', 'D')#
   1 /var/www/html/wp-includes/class-wp-hook.php(288): wc_cart_pdf_process_download('')#
   2 /var/www/html/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL,
   Array) #3 /var/www/html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)#
   4 /var/www/html/wp-includes/template-loader.php(13): do_action('template_redire...')#
   5 /var/www/html/wp-blog-header.php(19): require_once('/var/www/html/w...') #6/
   var/www/html/index.php(17): require('/var/www/html/w...') #7 {main} thrown in/
   var/www/html/wp-content/plugins/wc-cart-pdf/vendor/mpdf/mpdf/src/Mpdf.php on 
   line 9443`
 * Thanks!
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-with-mpdfmpdfexception%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Author [David Jensen](https://wordpress.org/support/users/dkjensen/)
 * (@dkjensen)
 * [6 years, 4 months ago](https://wordpress.org/support/topic/error-with-mpdfmpdfexception/#post-12271115)
 * Hello
 * I am not seeing this error when viewing the cart PDF. Did you already get this
   resolved or have you narrowed this down at all to a specific use case?

Viewing 1 replies (of 1 total)

The topic ‘Error with Mpdf\MpdfException’ is closed to new replies.

 * ![](https://ps.w.org/wc-cart-pdf/assets/icon-256x256.png?rev=3339735)
 * [Cart PDF for WooCommerce](https://wordpress.org/plugins/wc-cart-pdf/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wc-cart-pdf/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wc-cart-pdf/)
 * [Active Topics](https://wordpress.org/support/plugin/wc-cart-pdf/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wc-cart-pdf/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wc-cart-pdf/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [David Jensen](https://wordpress.org/support/users/dkjensen/)
 * Last activity: [6 years, 4 months ago](https://wordpress.org/support/topic/error-with-mpdfmpdfexception/#post-12271115)
 * Status: not resolved