are you on an osi shard?
He mentioned OSI a while back.
Sorry, the error you are talking about only happens when a rail file can't be found, or a waypoint is really out of wack. If you are 5-7 steps from the Heartwood portal and due south, it should just "work". I'm watching my guy walk the rail right now, and this is a freshly installed virtual machine. I downloaded the script, rails, engine and ran the script. No changes, or tweaks. Just ran the script and off it goes.