Error while i am trying to print a pdf invoice

[pahnas]

Hello everyone, for a long time now i am facing a problem to print my invoices .

every time i press print i get the error message "FPDF error: Some data has already been output, can't send PDF file"

i try to make the fix on fpdf file , but nothing has been fixed

 

i am using version 1.4.6.2 prestashop

 

please help

Edited September 4, 2014 by pahnas (see edit history)

[tuk66]

Set

define('_PS_MODE_DEV_', true);

in the /config/defines.inc.php file to see the error, because it is an error which is raised before the PDF is created.

[pahnas]

Hello and thanks for the advise but  it seems that dev mode is not working

I made the change and i select to force compile

Do i have to do something else

[tuk66]

See the Apache error log.

[pahnas]

thanks a lot. i desite to upgrate my eshop to newer version 1.6.9 but there is another problem here to export all the products with photo path, and all the categories with subcategories. There is any script or FREE module to do this.

thanks in advance