[Dovecot] Upgrading 1.2 to 2.x

Hi

I'm about to upgrade to 2.1.7 in my test environment, but "doveconf -n -c dovecot.1.conf > dovecot.2.conf" is producing a blank file, so I am unsure how to proceed. I know a lot has changed between them, so I don't really want to have to start from scratch unless I have to.

I have tried both as my user and with sudo.

Simon