TCPDF ERROR: Some data has already been output to browser, can't send PDF file

[kayol10]

I have just upgraded to Prestashop 1.6.0.9 and I get this message when trying to generate the pdf invoice in the back office:

TCPDF ERROR: Some data has already been output to browser, can't send PDF file

I have seen some related posts in 1.5 but none of the solutions provided there worked for me.

Has anyone else came across this?

Thanks everyone!

[tuk66]

It means you get an error when creating the invoice. Enable Debug mode to see the genuine error, not TCPDF one.

[kayol10]

Thanks fro the reply,

I looked up a post on how to enable debug changed from false to true in defines.inc.php -  (link) but I probably didn`t get the right details from the website:

 

Warning: Cannot modify header information - headers already sent by (output started at /home/cosme291/public_html/config/defines.inc.php:1) in /home/cosme291/public_html/classes/Tools.php on line 143

 

Thanks again!

[kayol10]

Tried every possible approach that other forum members mentioned, but nothing seemed to have worked for me. Anyone got other ideas? Much appreciated

[tuk66]

What is on the line 143 in Tools.php?

[kayol10]

This is what is shown in Tools.php on line 143 (red colored text)

/**

* Redirect user to another admin page

*

* @param string $url Desired URL

*/

public static function redirectAdmin($url)

{

header('Location: '.$url);

exit;

}