Platform Calculations

Hi

I used to be able to cut to the bottom of my excavation with a platform element (FFL - layerworks depth) and got the Cut Volume
Then I added the layerworks up to FFL and got the Import material Volume
I stack my calculations from left to right as I would construct it, i.e. First NGL, then Cut, Then Fill

Now the platform is an absolute element that keep on referring back to GL.
Where do I tell it to calculate from the previous element and not the GL element?
What am I missing?

I am using KC2024 V7.3.8992.25276

JR

Check the platform element's level/reference setting in Properties—KC2024 platform levels default to an absolute reference such as Ground Level. If there is a relative or previous-surface option, switch to that; if not, set the platform level as FFL minus the layerworks depth and compare the surfaces directly. Also confirm the platform sits in the correct order in the calculation list, since its volume is taken against the surface above it.