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.)
Very interesting, thanks, I’ll investigate tomorrow!
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.
