c:\adb>fastboot flash recovery openrecovery-twrp-18.104.22.168-pyramid.img
sending 'recovery' (8434 KB)...
OKAY [ 1.862s]
FAILED (remote: not allowed)
finished. total time: 2.178s
Did you HTC Dev unlock your bootloader or S-OFF'ed your device? It won't let you flash if you haven't done any of them.
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