Hikashop Entries - Edit /product/listing

I am currently setting up an event form that is associated with a few different products. When the user selects a product, everything works great. The problem occurs when the click next without selecting a field associated with the product.

The /product/listing page comes up and the users can see all the products and it says "Cart is empty" at the top of the page.

How do I prevent the users from seeing the entire list of products? I am assuming I edit that view file, but I am not exactly sure where to begin.

Thanks!

Hi,

The entry system was built so that at least one product would always be added to the cart by the entry custom fields and then redirect to the checkout.
If you don't have any product added to the cart, the checkout redirects to the products listing.
So even if you don't have any product you want to have the user pay, you would still need to add to the cart a product with a price of 0 via a entry custom field so that it works properly.