• Adobe After Effects Expressions

  Why are Extendscript objects invalidated when created inside functions?

  Posted by Carey Pagan on March 16, 2021 at 10:02 pm

  2

  function addControl(layer, name){
      newCtrl = layer("Effects").addProperty("Slider Control");
      newCtrl.name = name;
      return newCtrl;
  }
  var Slider1 = addControl(ExistingLayer, "slider 1");
  $.write(Slider1.name);
  var Slider2 = addControl(ExistingLayer, "slider 2");
  $.write(Slider1.name);
  
  Error Code# 45: Object is invalid
  Attempting to access Slider1.name after Slider2 is created results in an error as Slider1 is now [Invalid Object]
  I feel this has something to do with referencing and garbage collection but as javascript objects should pass as reference and 'addProperty' should create a new object, I don't understand why.
  I should add it fails with and without the 'var' keyword

  Carey Pagan replied 5 years, 2 months ago 1 Member · 0 Replies
• 0 Replies

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