xmms2: ERROR: Could not connect to xmms2d: xmms2d is not running.
I came around this error, it means that the daemon and the client don't run in the same directory.
xmms2d -i unix:///tmp/apantutarinte
export XMMS_PATH=unix:///tmp/apantutarinte xmms2 list
helps alot.
Edit: this is no more necessary with DrGonzo release.