In Revit 2019, Dynamo was not yet fully "baked into" the Revit installer in the way it is today.
Revit 2019 handles lists differently than pure coding. dynamo for revit 2019
elevations = [0, 3000, 6000] # in project units names = ["L1", "L2", "L3"] In Revit 2019, Dynamo was not yet fully
Unlike newer versions where Dynamo is deeply embedded, Revit 2019 requires a clean installation process to avoid conflicts. In Revit 2019
OUT = "Levels created"
