Massing cannot be created with a curtain roof. Please change the default roof type and try again.

public static FailureDefinitionId NoCurtainRoofsInMassing { get; }

Public Shared ReadOnly Property NoCurtainRoofsInMassing As FailureDefinitionId
	Get

public:
static property FailureDefinitionId^ NoCurtainRoofsInMassing {
	FailureDefinitionId^ get ();
}