Foundation structure

[Herbie76]

I have just started using chief 9 and have found a few things different to chief 8 that have confused me.

The one thing i can't get to work properly is the structures tab in regards to room specification. The platform thickness won't set to the foundation slab thickness when i have the "slab foundation for this room" tick box selected. It keeps the default joist depth set in the framing dialogue box no matter what the floor is.

I don't want to have to keep changing the depth of the joists in framing when it should default to the foundation slab depth set in the foundation default dialogue box.

I am lost as to why it won't work especially when i have built the foundation floor, rebuilt walls, floors and ceilings, as well as rebuilding the floors.

Can someone help me?