AS3 Compiler Error# 1021: Duplicate function definition..

AS3 Error 1023 Description:

This ActionScript error is the most terse error that AS3 has provided us.  It is nothing like AS3 Warning 1090 It popped up, rearing it’s ugly head like a teenager on Halloween. In most cases this error has more to do with AS3 Error 1021 than it does with an incompatible override.  Sometimes it realy does mean that you have an override that is incompatible but many times it just means that you have a function that is named the same as

Flex / Flash Error #1021 Fix:

Do exactly what the message says use an event listener instead of the onRelease event that was common in AS2.

Bad Code 1:

function bob () {
}

function bob () {
}

Good Code 1:

function bob () {
}

function jim () {
}

Bad Code 2:

var myArray:Array = [1,2,3];

function myArray () {
}

Good Code 2:

var myArray:Array = [1,2,3];

function myArrayFunction () {
}

Related Errors:

AS3 Error 3596
AS3 Compiler Error 1023
AS3 Error 1023 (Different error same number.  This one has nothing to do with error 1021)

This should help you resolve Flex / Flash Warning #1021

Thanks and as always Happy Flashing

Curtis J. Morley