ActionScript 3 :: Instantiate Class From String - Variable Not Defined

Aug 3, 2011

I've got a string which, in run-time, contains the name of a class that I want to instantiate. I read suggestions to use
flash.utils.getDefinitionByName():
var myClass:Class = getDefinitionByName("package.className") as Class;
var myInstance:* = new myClass();

However, that gives me the following error:
[Fault] exception, information=ReferenceError: Error #1065: Variable className is not defined.

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