Mohamed Thelji wrote: Your issue is probably coming from the fact that you didn't set any weight or dimensions through your product configuration page. Also, can you tell us what do you exactly mean by "although then of course the customer is not able to select their shipping preference." ?
Okay that seems to have solved the error. I input a weight on the test product in the individual product Restrictions and Dimensions area. It's true that I didn't have any values in this area for any of the products but on my current production site, I don't have any values in this area either for any items and do not have this problem on that site. I wonder why it would suddenly be an issue on this new site I am developing. Could it be something that the USPS API, for example, is triggering?
Also, are we saying that I have to input this value on a thousand individual items that I already have in inventory?
Could there be an easy way to accomplish this?
As to what I meant by "although then of course the customer is not able to select their shipping preference", if I set Force Shipping Regardless of Weight under Config>Checkout>Shipping & Payment, then during the checkout process, there simply is no shipping method displayed. Anyway that's not something i want to do, it was just a process of elimination on trying to troubleshot.
Anyway, thanks very much, I now know where to focus on.