We keep getting this error when we add products to our shopping basket.
 
Warning: Cannot modify header information - headers already sent by (output started at /home/smilemom/public_html/messages/en/cart_messages.php:680) in /home/smilemom/public_html/includes/shopping_cart.php on line 120
 
Not getting a lot help from support and this problem has been going on for a week now and I'm losing customers!
 
HELP!

Hi,
 
Could you please check whether file /messages/en/cart_messages.php is not corrupted. If so just replace it by one from etalon package of ViArt Shop that you have uploaded from our web site.
 
WBR,
ViArt Support team
 

I had similar warnings in the past; it could be that your webserver has created too many session files and that there the server can't create new session, because of imposed file limits from your provider. It might help to check out the session save path and clearing old session files on the web server.

I think you problem is the php page (cart_messages.php or shopping_cart.php or another of you php pages) was saved in Windows format not Unix format and has extra spaces in the file. Try saving your pages in a text editor that can save pages in Unix mode.
HTML-Kit build 292 is a free text editor that can do this. In HTML-Kit you would save as extra in Unix format.
You can get HTML-Kit for free at http://www.chami.com/
This problem happens sometimes when you unzip the downloaded files on a Widows computer and then upload to a Unix server.
You can check for this usually with you FTP program by comparing the file byte size on your computer to the file byte size on the web site the php page files should be the same size, when you are having this problem the file on you desktop computer is larger than the file on the Unix server.
Never never use Windows Notepad, WordPad or Word to open php files because this can also cause extra spaces to php files