String split script

I'm using this script to draw wireframe. Script read from string file, split coordinate and make vector3 array. In desktop mode all ok, but now in iOS give me error:

Assets/Script/Wireframe.js(33,23): BCE0050: Operator '-' cannot be used with an expression of type 'Object'.

 import System.IO;
 var Filename : String;
 
 var lineMaterial : Material;
 var lineColor : Color;
 var lineAlpha : float;
 var lineThickness = 1.0;
 var line3D = false;
 
 private var line : VectorLine;
 private var LinesArray : Vector3[];
 private var PointsList : Array;
 private var Lines : Array;
 private var i : int;
 
 function Start () {
     var sr = new StreamReader(Application.dataPath + "/" + Filename);
     var fileContents = sr.ReadToEnd();
     sr.Close();
     var Points = fileContents.Split(","[0]);
   
     //PointsList = new Array();
     for (i = 0; i < Points.length; i++){ 
     PointsList.Add(float.Parse(Points[i]));    
   }
     //Lines = new Array();
     for (i = 0; i < PointsList.length / 3; i++){ 
     Lines.Add(Vector3(-PointsList[i*3],PointsList[i*3+2],-PointsList[i*3+1]));
 } 
     LinesArray = Lines.ToBuiltin(Vector3); 
     line = new VectorLine("Line", LinesArray, lineColor, lineMaterial, lineThickness); 
     VectorManager.useDraw3D = line3D;
     line.joins = Joins.Weld;
     VectorManager.ObjectSetup (gameObject, line, Visibility.Dynamic, Brightness.None);   
 }
 
 function LateUpdate (){
     line.vectorObject.renderer.material.color.a = lineAlpha;
 }

Somebody help me to correct script?