Hey All,
This guy has the same issue as me, it didn’t get solved in the API forum…
https://forums.autodesk.com/t5/revit-api-forum/stacked-wall/td-p/8685047
Seemingly I need to collect the component walls from a stacked wall, so I can get their edges.
Seemingly edges cannot be returned from the solid of a stacked wall.
I can do this with nodes, but would welcome help with doing this in Python?
I’d like the user to be able to drag a box… Seeming this approach returns results both in Dynamo & my Python which do not return the component walls.
@Alban_de_Chasteigner maybe this is of interest to you as well 
test.rvt (1.4 MB)
object edge test.dyn (24.9 KB)
Edit: So I think I have to get all walls in view and see if they or their host wall match the selected walls… quite slow 
Hi @Mark.Ackerley,
Thanks for the notification.
I would use the Get Wall Member node before the Compound Edges References node.
(Unfortunately this API method only returns the wall type and not the wall instances directly.)
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Very interesting, thanks, I’ll investigate tomorrow!
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So for posterity, here’s the python…
#if I cast the selection to a list I find it easier to work with
targetWalls = list(targetWalls)
for tWall in targetWalls:
if tWall.IsStackedWall == True:
targetWalls.extend(doc.GetElement(sub) for sub in tWall.GetStackedWallMemberIds())
for tWall in targetWalls:
if tWall.IsStackedWall == True:
targetWalls.remove(tWall)
OUT = targetWalls
I couldn’t remove the stacked walls without a duplicate loop, I expect a lambda would be the way to do it, but I’ll do that another day!
Hi Mark,
I made an improvement on the custom node to also return the instances of walls.
This will probably be useful for similar worklows with stacked or curtain walls.
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