USPS released an update to their API as they do quarterly, and it always breaks cart66. If you depend on cart66, whether you pay for the premium service or not, you need to know how to update the function that connects to the USPS API, or you’re going to have a bad time.
This developer is flakey and doesn’t proactively issue the updates. Combine that with USPS’s horrible way of dealing with their API, and you have a train wreck waiting.
Since you probably don’t have too many products, the quick fix is to set fixed shipping rates on each item. Cart66 is no the program you want to be using if you are actually doing volume.
Thanks for the info. Much appreciated. Any idea where I can find information on how to update the Cart66 USPS API function?
It’s been a month. Any change someone has found a solution to this? It doesn’t seem like the developer has any plan to fix it. I am using the paid version and it is broken as well.
My problem resolved itself after Cart66 issued an update, which fixed the live shipping rates connection to the USPS. If you haven’t installed the latest Cart66 update yet, try that. Another idea: If you’re using live shipping rates, you might want to try disabling that function and then setting fixed prices for shipping.
