Looks like something screwed up. Once you are S-OFF, you do not need to lock the bootloader or S-ON to run RUU. It is (was) your get out of jail card.
Can you select factory reset from the bootloader menu? What is the result? If no go, then unlock bootloader, flash custom recovery, restore backup and/or flash custom rom, and restart the process.
Also what RUU were you trying to run, and why? Warranty related?