Geometry Union Error

Hi all,

I am trying to union the whole Revit file into one single mass, I have 190 nos. of elements in my model , i tried to apply the dynamo to (1)Floor / (2)Generic Models / (3)Structural Columns / (4)Structural Foundations and (5)Walls, in other words, 177 elements in total.

But I got EDGECOIN PROBLEM for my Soild.UnionAll node.

I can do what I want if I only union the first 22 elements in my list, but it fails if I union everything together.

Thanks a lot in advance.

I am using Revit 2017 and Dynamo 0.9, thanks.

Model:
http://a360.co/2rdBUUI

Dynamo: