AbleCommerce Shopping Cart Software

We have been using USPS shipping for the past 2 years and today something is wrong.

We are no longer able to get rates from USPS as of today (during checkout no USPS rates are available in our shipping method dropdown).

I do not see any error messages in the able commerce error log nor are there error messages in any of the Windows event logs.

I just got off the phone with USPS, there is nothing wrong with our user id according to them.

Please help!

UPDATE:

In the source code, a call is made to the USPS Shipping Provider. The call is made to GetShipRateQuote with my shipment and the ServiceCode "Priority Mail". The ShipRateQuote that is returned from the method is null. I can't see what's going on inside this method because I don't have source code for the USPS provider. The version property of the USPS provider I'm using says its v6.0.0.

UPDATE 2:

I fixed the problem. The Service Code needed to be updated to "Priority Mail^®" as the patch from January had it. I certainly did apply this patch and have been using USPS successfully for the past few months. However, I believe when I updated the handling charge yesterday this shipping method's service code reverted back to the old ServiceCode of "Priority Mail" somehow. This must be a bug in the UI???

I had this exact same issue. I went in and made one little change the other day and broke the whole system. I then deleted all my setups and recreated them and it all seemed to work fine.

Does anybody know the proper service code for Priority Mail International Small Flat Rate Box? (I can get Priority Mail International to work just fine.) I can't find that documentation anywhere on USPS's site.

The closest that I can find is here: http://support.volusion.com/article/upd ... nuary-2012, which says "Priority Mail^® International Small Flat Rate Box", but I tried that (and variations thereof) and I can't seem to get it to work.