Is this WPA2 Password uncrackable?

[DaKahuna]

Yes, it is possible to crack a 12 character password. It's just a matter of how long it will take your system to do it.

What error message do you get when you enter that command " hashcat64.exe -m 2500 -1 ?d?u?l davehash.hccapx ?1?1?1?1?1?1?1?1?1?1?1?1 "

Google for the error message.