The Cobra ODE uses a file called ultimate.u64 as its firmware payload. The “463 mk3” part refers to a specific hardware revision of the Cobra bridge board.
When the system says not found, it means:
Possible causes:
You need the exact firmware for Cobra ODE mk3 (not mk2 or mk1).
Look for ultimate463.u64 or ultimate.u64 version 4.63 (mk3).
(We can’t link files here, but search “Cobra ODE 4.63 ultimate.u64” on trusted PS3 homebrew forums.) 463 mk3 ultimate.u64 not found
Cobra ODE is abandonware – no official updates since ~2015.
If you’re comfortable with more modern PS3 hacking, consider switching to full CFW (Custom Firmware) like Evilnat or HEN if your console is compatible. They don’t rely on .u64 files and are much easier to maintain. The Cobra ODE uses a file called ultimate
If you are using a 1541 Ultimate or Ultimate-64 hardware: Possible causes: