HELP: rake db:migrate -> uninitialized constant

Why is this error happening? I am using Rails 1.2.3.

./script/generate model MyNewModel       exists app/models/       exists test/unit/       exists test/fixtures/       create app/models/my_new_model.rb       create test/unit/my_new_model_test.rb       create test/fixtures/my_new_models.yml       exists db/migrate       create db/migrate/010_my_new_models.rb % rake db:migrate (in /tmp) rake aborted! uninitialized constant MyNewModel

(See full trace by running task with --trace)

% rails --version Rails 1.2.3

Try re-running the migration with the --trace option. It will dump a strack trace along with the error message showing you (or us if you post the output here) exactly where the migration is choking.

-John