Share Email Facebook Twitter LinkedIn BuiltInFailures.PlanRegionFailures.Nested Property Cannot have nested Plan Regions. Namespace: Autodesk.Revit.DBAssembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0) Syntax C# public static FailureDefinitionId Nested { get; }Property ValueFailureDefinitionId See AlsoReferenceBuiltInFailures.PlanRegionFailures ClassAutodesk.Revit.DB Namespace