unable to transcode this meaningless error message

If you're compiling with mxmlc on Linux, and you get the 'unable to transcode' error message, and you're transcoding hundreds of files... and you've wasted two days on this (no, I'm not bitter):

>: ulimit -a

That may be really small. Like 1024 files. Try compiling again after:

>: ulimit -n 5000

Better? mxmlc swallows the Java IO error #fml >_<