Using SWC Library assets dynamically in Flex

I was working on a Flex project last week that dynamically used assets from a Flash library SWC and came across something I thought was worth sharing.

The application compiled correctly when using the assets within the code i.e. var object:Asset = new Asset(). However, when choosing to use the asset dynamically (with the use of getClassByAlias()) the application threw a runtime error. So, unless the asset was used within the application it was not compiled into the published application.

I found that by changing the link type of the SWC from ‘Merged into code’ to ‘Runtime shared library (RSL)’ I was able to use the asset dynamically within the application without the asset being used within the code.

Therefore, if you want to use Flash library assets from a SWC dynamically ensure that the link type of the SWC is set to ‘Runtime shared library’.

Does anyone have any comments or different solutions?