Stairs require boundaries (chains of one or more Boundary Lines) on each side of the Stair.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0)
Syntax
C#
public static FailureDefinitionId StairNotEnoughBoundaryCurves { get; }