You have invalid items in the store's itemfile.
Please remove these items and reupload the itemfile. Your item file may be using special characters in the item code, such as #, (spaces), or &, and these need to be removed from you item file to work properly with the cart. After changing your item code field to the corrected format, if you added add to cart buttons to your web pages, you will need to replace them with the new codes that do not contain special characters. Be Sure to have all your prices in this format. 19.99 or 175.00. No Dollar signs or commas.Redo your itemfile with these changes then upload them again.
