Quote Originally Posted by sonjamichelle View Post
Warning: Cannot modify header information - headers already sent by (output started at /home/content/s/o/n/sonjamichelle/html/catalog/admin/products_with_attributes_stock.php:193) in /home/content/s/o/n/sonjamichelle/html/catalog/admin/includes/functions/general.php on line 21
You're using the multiadd variant of this mod. Unfortunately the author left a debug statement in at line 193 of admin/products_with_attributes_stock.php. It's this that is triggering the errors. You can just delete it.