Here is an example error when running one of the example projects:
...\Projects\away3dexamples-fp11\src\away3d\filters\tasks\Filter3DTaskBase.as(132): col: 26 Error: Call to a possibly undefined method AGALMiniAssembler.
I copied the entire away3d in my src folder and the class seem to be there?
I am running Flex SDK 4.6 using FlashDevelop on Windows