Moving multiple controllers at once

[Lupp_]

Sorry but I must bother you one more time. This code gives no errors in Visual B.

Code:

private void OnEnable()
       {
           List<SplineController> selectedItems = Selection.transforms.Select(t => t.gameObject.GetComponent<SplineController>()).Where(c => c != null).ToList();
          
           if (selectedItems.Count > 1)
           {
               index = 0;
               controllers = selectedItems.ToArray();
               makeWindow = true;
               foreach(SplineController checkController in controllers)
               {
                   orgPos[index] = checkController.AbsolutePosition;
                   maxPos[index] = checkController.Spline.Length;
                   Debug.Log(orgPos[index]);
                   Debug.Log(maxPos[index]);
                   Debug.Log(controllers[index]);
                   index++;
               }
               
           }

But once in Unity I get this when I select objects with controllers.

NullReferenceException: Object reference not set to an instance of an object
FluffyUnderware.CurvyEditor.Controllers.MoveMultipleControllers.OnEnable () (at Assets/Game Assets/Editor/MoveMultipleControllers.cs:42)

Line 42 is the first in the loop.

I don't get this, doesn't "List<SplineController> selectedItems" contain the controllers or is it something else I've done wrong?