add to cart produces blank page
one of three product pages is producing a blank page when adding to cart. been running fine for years.
this is the error I'm getting:
"Warning: Cannot modify header information - headers already sent by (output started at /home/breezewo/public_html/altnew.php:41) in /home/breezewo/public_html/altnew.php on line 221"
line 221 is header("Location: ".$eCart1->redirStr);
which is the same on the other two pages that work