Field help (TCTRNUMA)

If you perform a single-container shipment, specify the "freight" type container used in the shipment. The freight container selection list is filtered and only includes those freight containers sharing the same container. This information, which is linked to the quantity of containers used, will determine the maximum weight and maximum volume to be shipped.
Leave this field blank if you want to perform a shipment with multiple containers, or a shipment of order lines.