The splitting boundary drawn would result in a self-intersection of the surface boundary. Please edit your splitting lines to correct the problem.

public static FailureDefinitionId SurfaceSelfIntersection { get; }

Public Shared ReadOnly Property SurfaceSelfIntersection As FailureDefinitionId
	Get

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