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If by "Workspace" you actually mean it's a "Workset" issue, there is a legitimate reason this is turned off by default. So in AutoCAD, freezing is different than hiding a layer because freezing it also un-loads the demand of the elements on that layer. Same with Worksets in Revit. It's one thing to hide a link, or elements in a model, it's another thing to close the Workset so it un-loads the demand of the objects themselves. We do that on huge architectural models, and if you are doing AV on a big building I'm going to guess it's probably a fine arts building or something else that is architecturally "heavy" in design, as most heavy AV jobs are because of the aesthetics of the building design. Hope that helps some. -TZ

Neither is G... Thanks. Fixed.

H is not valid hex...

(defun is-hex-p (str) (wcmatch str "~*[~0-9a-fA-F]*") )

The other dimension is 8000.00000029. In fact when the precision is set to 8 places of decimals, some of the dimensions do not seem to be exact. The overall length is 63999.99999925. Probably near enough not to matter, but when exactness is available, why not use it?

The rectangle is not snapped exactly to the corner point of the column on the left side. If you zoom in really close, you will see that's it's not snapped correctly. And if you measure the distance you will see that it's off by 0.00539. If you delete that rectangle and draw a new one, it should be correct, as long as you carefully select the endpoints of the columns.