Use this tab to view the unattached reservation lines for shipment lines attached to handling units. It will display the attached shipment lines for the handling unit selected in the the handling unit structure, including any attached handling unit in the sub-structure of that handling unit, for which unattached reservation lines exist.
When the whole quantity for a reservation line is attached, that line is removed from this tab. So if no records exist in this tab, it either means that no reservations exist for the shipment lines already attached to selected handling units, or that the whole quantity for those reservation lines is already attached to some handling units.