You may come across a take off quantity in Cubit that shows 0.00.
Fig.1 Zero Quantities
This can occur due to the selected result type for the takeoff being incompatible with the shape that has been drawn in the Viewport.
For example, if you draw a shape in the viewport that is not enclosed and has an area result type applied, Cubit cannot calculate a quantity for this shape.
Cubit will usually display an error (Refer Fig.2) to warn the user that quantity of zero has been returned from the take off.
Fig.2 Error Message