[Radiant] Problem running setup_database

[Tom Clark]

Hi all,

This looks like a great project. I'm looking forward to working with it, if
I can get the first bit to go right...

Here's my problem - am trying to set up the database. Have set up my
database and configured it in database.yml (tried MySQL and sqlite3).
However, when I come to run script/setup_database production, this happens:

Loading production environment...FAILED
script/setup_database:79:in `load_environment': uninitialized constant
DatabaseSetupApplication::RADIANT_ROOT (NameError)
        from script/setup_database:258:in `announce'
        from script/setup_database:77:in `load_environment'
        from script/setup_database:17:in `run'
        from script/setup_database:9:in `run'
        from script/setup_database:297

I'm using shared hosting, although when I tried this on my local machine the
same error occurred.

Would anyone have a clue as to what's going on here? Searched the archives
but could not find anything relevant.

Many thanks

Tom