This error message:
is displayed when you attempt to create a UPS Mail Innovations shipping label with a packaging selected other than one of the UPS carrier packaging choices.
UPS Mail Innovations works differently than other UPS services in that only a specific set of package types that are defined by UPS are valid for use with UPS Mail Innovations services.
For example, when creating a domestic Expedited Mail Innovations shipment, you must choose from one of the carrier packaging selections:
For more information, refer to our article on which package options are valid for UPS Mail Innovations?