Create an arrow dynamically following the spline

[yandrako]

I think that have to do with Initializing the complete spline system at start.
Are you sure the splines are fully initialized when you use it?

Code:

 IEnumerator Start() {
          foreach (var Spline in FindObjectsOfType(typeof(CurvySpline)) as CurvySpline[]) {
              while (!Spline.IsInitialized) {
                  yield return null;
              }
          }
      }

You can check this, if you wait a second, then calling your function.
public int frames;

Code:

void Update(){
  frames++;
  if (frames > 100)  run your function to create the arrow.

}

only an idea.

Thank you for the idea. I've check if the spline is initialized with a simple 

Code:

Debug.Log ("spline -> " + launcherSpline.IsInitialized);

And it returns always true. You made me doubt about if there is some problem with the initialization. I dont do an initalization at code, I create the curvy spline on the inspector with 3 Control Points, and it used to interpolate between them to make a smooth curve. But its no longer the case so with only the 3 Control Points, on sometimes it add a fourth one on the fly to interpolite a tiny bit but not enough to make a smooth curve. So I think is an interpolation problem, dont know if I have to do something else to make that interpolation works as a smooth curve. Is there any method to "initialize forcing the spline to have X positions based on just 3 Control Points?