question

[{"ShortMessage":"Invalid shipping package.","LongMessage":"Invalid .","ErrorCode":"10081","SeverityCode":"Error","ErrorClassification":"RequestError"}] I've tried changing a few things around to no avail. I can't seem to find a list of which combination of which ShippingPackage and ShippingService combinations are valid (just lists of each) and the error doesn't tell me anything to remedy the situation. Here's the relevent part of the request.

<ShippingPackageDetails>
    <ShippingIrregular>false</ShippingIrregular>
    <ShippingPackage>PackageThickEnvelope</ShippingPackage>
    <PackageDepth>12.2</PackageDepth>
    <PackageLength>11</PackageLength>
    <PackageWidth>17.7</PackageWidth>
    <MeasurementUnit>English</MeasurementUnit>
    <WeightMajor unit="lbs">1</WeightMajor>
    <WeightMinor unit="oz">15</WeightMinor>
</ShippingPackageDetails>
<ShippingServiceOptions>
    <ShippingService>AU_StandardDelivery</ShippingService>
    <ShippingServicePriority>1</ShippingServicePriority>
    <ShippingServiceCost>0</ShippingServiceCost>
    <FreeShipping>true</FreeShipping>
</ShippingServiceOptions>
<ShippingType>Flat</ShippingType>

Thanks kindly!