A boundary on this surface could not be autodetected. Revit will impose one, but it may be larger than you want.

public static FailureDefinitionId BoundaryDetectError { get; }

Public Shared ReadOnly Property BoundaryDetectError As FailureDefinitionId
	Get

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