(Error code 2c0480)
This error no longer exists in the iPXE source code. You should try using the latest version of iPXE.
(Please edit this page to include any of your own useful hints and tips for fixing this error.)
Make sure you have a open and working network interface when running boot
Even if you are trying to load files from disk only via file:/ you still have to have an open network interface for iPXE to bind to.