I have two Zencart sites. I used the USPS shipping module. Today it suddenly stopped working right on both sites, but I didn't change anything.
It only sends back a value if the shipping weight is enough for priority. If the shipping weight is less that .8125 it should list the value for 1st class parcel. Instead it lists nothing. If they try to check out it won't let customers past the shipping page of the checkout process.
I tried turning on debug, but everything looks fine in the debug.
Sample Debug:
<?xml version="1.0" encoding="UTF-8"?>
<RateV4Response><Package ID="0"><ZipOrigination>29485</ZipOrigination><ZipDestination>29483</ZipDestination><Pounds>0</Pounds><Ounces>4</Ounces><FirstClassMailType>FLAT</FirstClassMailType><Size>REGULAR</Size><Machinable>FALSE</Machinable><Zone>1</Zone><Postage CLASSID="0"><MailService>First-Class Mail&lt;sup&gt;&#174;&lt;/sup&gt; Parcel</MailService><Rate>2.50</Rate><SpecialServices><SpecialService><ServiceID>9</ServiceID><ServiceName>Certificate of Mailing</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>1.30</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>1</ServiceID><ServiceName>Insurance</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>2.10</Price><PriceOnline>0</PriceOnline><DeclaredValueRequired>true</DeclaredValueRequired><DueSenderRequired>false</DueSenderRequired></SpecialService><SpecialService><ServiceID>5</ServiceID><ServiceName>Registered Mail&lt;sup&gt;&#8482;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>11.95</Price><PriceOnline>0</PriceOnline><DeclaredValueRequired>true</DeclaredValueRequired><DueSenderRequired>false</DueSenderRequired></SpecialService><SpecialService><ServiceID>4</ServiceID><ServiceName>Registered without Insurance</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>11.95</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>0</ServiceID><ServiceName>Certified Mail&lt;sup&gt;&#174;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>3.30</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>13</ServiceID><ServiceName>USPS Tracking&lt;sup&gt;&#8482;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>true</AvailableOnline><Price>1.05</Price><PriceOnline>0.00</PriceOnline></SpecialService><SpecialService><ServiceID>15</ServiceID><ServiceName>Signature Confirmation&lt;sup&gt;&#8482;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>true</AvailableOnline><Price>2.90</Price><PriceOnline>2.35</PriceOnline></SpecialService><SpecialService><ServiceID>6</ServiceID><ServiceName>Collect on Delivery</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>6.95</Price><PriceOnline>0</PriceOnline><DeclaredValueRequired>true</DeclaredValueRequired><DueSenderRequired>true</DueSenderRequired></SpecialService></SpecialServices></Postage></Package><Package ID="1"><ZipOrigination>29485</ZipOrigination><ZipDestination>29483</ZipDestination><Pounds>0</Pounds><Ounces>4</Ounces><FirstClassMailType>PARCEL</FirstClassMailType><Size>REGULAR</Size><Zone>1</Zone><Postage CLASSID="0"><MailService>First-Class Mail&lt;sup&gt;&#174;&lt;/sup&gt; Parcel</MailService><Rate>2.50</Rate><SpecialServices><SpecialService><ServiceID>9</ServiceID><ServiceName>Certificate of Mailing</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>1.30</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>1</ServiceID><ServiceName>Insurance</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>2.10</Price><PriceOnline>0</PriceOnline><DeclaredValueRequired>true</DeclaredValueRequired><DueSenderRequired>false</DueSenderRequired></SpecialService><SpecialService><ServiceID>5</ServiceID><ServiceName>Registered Mail&lt;sup&gt;&#8482;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>11.95</Price><PriceOnline>0</PriceOnline><DeclaredValueRequired>true</DeclaredValueRequired><DueSenderRequired>false</DueSenderRequired></SpecialService><SpecialService><ServiceID>4</ServiceID><ServiceName>Registered without Insurance</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>11.95</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>0</ServiceID><ServiceName>Certified Mail&lt;sup&gt;&#174;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>3.30</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>13</ServiceID><ServiceName>USPS Tracking&lt;sup&gt;&#8482;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>true</AvailableOnline><Price>1.05</Price><PriceOnline>0.00</PriceOnline></SpecialService><SpecialService><ServiceID>15</ServiceID><ServiceName>Signature Confirmation&lt;sup&gt;&#8482;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>true</AvailableOnline><Price>2.90</Price><PriceOnline>2.35</PriceOnline></SpecialService><SpecialService><ServiceID>6</ServiceID><ServiceName>Collect on Delivery</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>6.95</Price><PriceOnline>0</PriceOnline><DeclaredValueRequired>true</DeclaredValueRequired><DueSenderRequired>true</DueSenderRequired></SpecialService></SpecialServices></Postage></Package><Package ID="2"><ZipOrigination>29485</ZipOrigination><ZipDestination>29483</ZipDestination><Pounds>0</Pounds><Ounces>4</Ounces><Container>VARIABLE</Container><Size>REGULAR</Size><Zone>1</Zone><Postage CLASSID="1"><MailService>Priority Mail 2-Day&lt;sup&gt;&#8482;&lt;/sup&gt;</MailService><Rate>5.60</Rate><CommercialRate>5.05</CommercialRate><SpecialServices><SpecialService><ServiceID>9</ServiceID><ServiceName>Certificate of Mailing</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>1.30</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>1</ServiceID><ServiceName>Insurance</ServiceName><Available>true</Available><AvailableOnline>true</AvailableOnline><Price>2.10</Price><PriceOnline>2.10</PriceOnline><DeclaredValueRequired>true</DeclaredValueRequired><DueSenderRequired>false</DueSenderRequired></SpecialService><SpecialService><ServiceID>5</ServiceID><ServiceName>Registered Mail&lt;sup&gt;&#8482;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>11.95</Price><PriceOnline>0</PriceOnline><DeclaredValueRequired>true</DeclaredValueRequired><DueSenderRequired>false</DueSenderRequired></SpecialService><SpecialService><ServiceID>4</ServiceID><ServiceName>Registered without Insurance</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>11.95</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>0</ServiceID><ServiceName>Certified Mail&lt;sup&gt;&#174;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>3.30</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>13</ServiceID><ServiceName>USPS Tracking&lt;sup&gt;&#8482;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>true</AvailableOnline><Price>0.00</Price><PriceOnline>0.00</PriceOnline></SpecialService><SpecialService><ServiceID>7</ServiceID><ServiceName>Return Receipt for Merchandise</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>4.40</Price><PriceOnline>0</PriceOnline></SpecialService><SpecialService><ServiceID>15</ServiceID><ServiceName>Signature Confirmation&lt;sup&gt;&#8482;&lt;/sup&gt;</ServiceName><Available>true</Available><AvailableOnline>true</AvailableOnline><Price>2.90</Price><PriceOnline>2.35</PriceOnline></SpecialService><SpecialService><ServiceID>19</ServiceID><ServiceName>Adult Signature Required</ServiceName><Available>false</Available><AvailableOnline>true</AvailableOnline><Price>0</Price><PriceOnline>5.20</PriceOnline></SpecialService><SpecialService><ServiceID>20</ServiceID><ServiceName>Adult Signature Restricted Delivery</ServiceName><Available>false</Available><AvailableOnline>true</AvailableOnline><Price>0</Price><PriceOnline>5.45</PriceOnline></SpecialService><SpecialService><ServiceID>6</ServiceID><ServiceName>Collect on Delivery</ServiceName><Available>true</Available><AvailableOnline>false</AvailableOnline><Price>6.95</Price><PriceOnline>0</PriceOnline><DeclaredValueRequired>true</DeclaredValueRequired><DueSenderRequired>true</DueSenderRequired></SpecialService></SpecialServices></Postage></Package></RateV4Response>
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