Massing cannot be created with a curtain roof. Please change the default roof type and try again.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax
C#
public static FailureDefinitionId NoCurtainRoofsInMassing { get; }