Hello, I want to collect ducts at level 1, but I got empty result…what’s wrong with my code? [image] import clr import Revit clr.AddReference("RevitServices") import RevitServices from RevitServices.Persistence import DocumentManager clr.AddReference("RevitAPI") import Autodesk from Autodesk…

I think I know where is the mistake the builtin parameter of reference level of structural framing and duct is different :frowning: I changed BuiltInParameter.INSTANCE_REFERENCE_LEVEL_PARAM to BuiltInParameter.RBS_START_LEVEL_PARAM then I fixed the problem :slight_smile: [image]

Collect duct at level

Revit

Draxl_Andreas August 30, 2022, 7:01am 2

@newshunhk ,

check out this topic

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Collect duct at level

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