Whenever i create a FIlled Region with the FilledRegion.ByCurves node it deletes the previous created Filled Region. i.e. I select a Floor (FL1) and create a Filled Region from (FR1) that Floor boundary, then i select a new Floor (FL2) to create a FIlled Region from (FR2), but FR1 gets deleted …

FilledRegion.ByCurves deletes Filled Region

Alban_de_Chasteigner June 14, 2020, 9:34am 2

This is called Element Binding.
See this topic for a detailed explanation :

Topic		Replies	Views
FilledRegion.ByCurves+ gives null Geometry revit , geometry , dynamo	15	450	August 24, 2022
Filled Region by curves Revit dynamo	5	430	March 1, 2023
Selecting Model Elements (Filled Region) Revit	1	1090	July 22, 2019
Link filled region from Dynamo to Revit Revit	1	295	July 20, 2019
Unable to create filled region Geometry revit , geometry , dynamo	4	404	August 28, 2020