Problem unlocking HTC phone using their  fastboot program According to HTC, my Amaze 4G is fully ready from the factory to be queried for its identifier tolken, but when I run the appropriate command, it doesn't work. I get:

$ fastboot oem get_identifier_token
...
(bootloader) [ERR] Command error !!!
OKAY [  0.010s]
finished. total time: 0.010s
$


Note that someone reported the same problem, but their phone requires updating firmware and running "RUU". You can read about that here.

Same problem, different cause. Note that I did update the SDK prior to trying run fastboot - I wonder if I shouldn't have! 

It's worth mentioning that I called HTC and asked for help and they were of no particular assistance; "You know more about it than I do." "How do I report a bug on fastboot?" (No useful reply to that!)
[ERR] Command error !!! is a generic response from fastboot. In effect it means &quot;invalid command arguments.&quot; Check that you are writing the command correctly, in my case I made a typographical error and this was the result.