Unable to log in to FFXI. After selecting character I get a black Downloading Data screen, and then FFXI-3001 error which returns me to Final Fantasy XI title screen.

The character experiencing this error logged out inside Bastok Mog House, after zoning into the Mog House from Port Bastok.

My second character on the same account can log in with no issues, and also logged out inside Bastok Mog House, although my second character entered the Mog House from Bastok Mines.