Nomadic is a *child* theme, which means you must have the Genesis theme also installed.
If you do not have Genesis, then Nomadic will not work.
Go to your eb host using ftp or cpanel and remove the theme.
These forums were CLOSED to new posts on November 19th, 2012. New forums are here: http://www.studiopress.com/forums/
and you will need to SIGN UP AGAIN.
If you need assitance with setting up your theme, go to http://my.studiopress.com/
and read the SETUP links or the TUTORIALS link on the side tab.
If you need Account Assistance
, file a help desk ticket at the same location.