The cart items combined volume is too small for all the possible shipping method

Hi,

When you get an error message regarding the shipping methods, it means that no shipping methods was found. Now if you have several shipping methods configured, it can mean that one shipping method was discarded for one reaosn while another one was discarded for another reason. In order to not confuse the user too much, only one error message is displayed.
So if you have several shipping methods configured, you might actually see the error message coming from the restrictions of another shipping method than the one you're looking at.
To know of the reason why a shipping method doesn't display for a cart, the best is to temporarily disable the other shipping methods so that you're sure you're getting the error message for that shipping method.
So please check on that.

Hi,

Note that USPS requires the user address to be able to provide shipping rates.
So before the user has entered his address (or logged in with a user account which already has one), the USPS shipping plugin won't give back any rate. In that case, the system will try the other shipping methods and if none are matching, it will display a message corresponding to the restrictions of one of the other shipping methods preventing HikaShop from using them.

So then it depends on what you want to do. You could potentially have several steps in your checkout so that the address is always entered before reaching the shipping method selection stage like a lot of online shops do. You can configure that under the Checkout tab of the HikaShop configuration ( www.hikashop.com/support/documentation/4...eckout-workflow.html ).
Or you could have a manual shipping method restricted to the "guest" user group with it's "access level" setting so that it would display before the user registers / logs in so that there wouldn't be an error message displayed on the shipping methods selection area if you want it on the same step.