I have tried to load STL file format in Away3D 4, but i couldnt find any good solution, i tried using STLReader of https://github.com/pranavh/AS3STLViewer it wo,rks only for Ascii files, not for binary files. then tried using AssetLibrary, AssetLoader, Loader3D, nothing works for me.

By default, most of the 3d formats have individual parser, but there is no parser for STL, for loading STL, parser is required ?

I m attaching zip contatining a stl file, away3d source and STLReader.

Can anyone help me to resolve this big issue ?

There is no native parser for STL in Away3D.
You can load your .stl with Prefab3D and export it as awd, as3, obj etc… for your away3d project.

Prefab supports both binary and ascii STL’s and exports as well in both tastes.