sudo: no tty present and no askpass program specified

[Tom H]

> On karmic, I have put the following line into my sudoers file
>
>  naclt ALL = NOPASSWD: /usr/local/bin/naclient
>
> to allow execution of this program as root from remote hosts. So from the
> remote host, I do
>
>  /usr/bin/ssh -i /home/me/.ssh/naclt-dsa \
>              -o "ServerAliveInterval 60" \
>              -o "ServerAliveCountMax 3" \
>              naclt at server.my.domain \
>              /usr/bin/sudo /usr/local/bin/naclient version
>
> But sudo errors out:
>
>  sudo: no tty present and no askpass program specified
>
> Why is sudo trying to ask a password here? Did it not get the NOPASSWD
> option?
>
> This works perfectly fine with jaunty with exactly the same sudoers file.

http://www.sudo.ws/pipermail/sudo-users/2009-August/004140.html