ActionScript 3.0 :: Can't Extend From 2 Classes

Apr 12, 2011

I have an "Extern" class and a "Shape" class.

The "Shape" class contains a shape, within the constructor with some default properties, like Shape width, Shape height, line Thickness ...

The "Extern" class has some setter/getter code in it - other classes can extend from it and can set their height and width[code]...

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The examples I'll use don't do anything - they're classes without ANY members - no variables, methods, anything.

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[Code]...

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[Code]...

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I am working on inheritance for the first time. Here is the super class
SetBlank.as

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[Code] .....

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Code:
package {
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[Code] .....

Thats my ExtendClass for the FileReference but when I try to use it in combination with File Selecting I get the Error
TypeError: Error #1034: Typumwandlung fehlgeschlagen: flash.net::FileReference@35bf8c1 kann nicht in CustomFileReference umgewandelt werden.
at CustomFileReferenceList/::selectHandler()

Well that's in german but it says me that I cant change from FileReference to my CustomFileReference Type. It happens in the selectHandler after I select some Files to upload and then try to Handle them.

Code:
fileListArray.push(CustomFileReference(fileList[item]));
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