Arch Spaces - default floor is wonky

[JellyPalm]

Hiya,
I am exporting room spaces from a building model into a new document to use them in a TechDraw scenario.

My 2 issues are as follows.

Un.
I am using copy-&-paste.
It works.
Its slow. but dependable.
Is this able to be done better with a Link and how?

-----------

Deux.
Most of my spaces created ok in the original model.

One of them however, shows an incorrect floor plane (see picture of model).

high floor.PNG (72.78 KiB) Viewed 392 times

.

Property/Attribute/IFC data, shows its equation-driven Elevation at 1437, which makes sence when you look at the space. But it should be 0 like all the others.
.

high floor properties.PNG (7.29 KiB) Viewed 392 times

.

How do I edit this property or cause it to re-calculate?

merci.

OS: Windows 8.1 (6.3)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.22960 (Git)
Build type: Release
Branch: master
Hash: c5a4b01d2e4218bcc0eb6650337650a6c65ef0e4
Python version: 3.6.8
Qt version: 5.12.1
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/United Kingdom (en_GB)

[Roy_043]

AFAIK the room algorithm first creates an oversized solid, and then slices off portions using the faces of the selected room boundary elements. The raised floor level in one of your rooms suggests that one of the boundary elements has a face at that position.

To correct things you can try to Part_Fuse a moved copy of the room with the original room.