Class in loaded SWF cannot use base class in loading SWF

Question

I have two SWF files which I shall call container and slave. The slave file contains a movieclip that extends from a class I shall call base. base extends MovieClip and is compiled into an SWC. slave includes this SWC as a runtime library, while container includes it as merged (and does reference it so it should be compiled into the container SWF).

The container loads the slave like so:

bgURLRequest = new URLRequest(slaveUrl);
var context:LoaderContext = new LoaderContext(false, new ApplicationDomain( null ), SecurityDomain.currentDomain);          
bgLoader.load(bgURLRequest, context);

When this loading happens, I get the error that class base was not found. I suspect this has something to do with the presence of the ApplicationDomain in there. I'm not sure what it does exactly, since I didn't write this loading code myself (but I do know that it's there for a reason so it can't be simply removed).

How to fix?

Answer 1

This is the solution

new LoaderContext(false, new ApplicationDomain( ApplicationDomain.currentDomain ), SecurityDomain.currentDomain); 

Answer 2

Use ApplicationDomain.currentDomain and track the available classes with the super getDefinitionNames available at: http://etcs.ru/pre/getDefinitionNamesSource/

At least you'll know whats available in the loaded swf.