I got up to Step 18 in Exercise 5 but I am getting the following error:

Multiple initializers for property 'dataProvider'. (note: 'dataProvider' is
the default property of 'mx.controls.List').

I'm not sure what the error means but I haven't touched the dataProvider
parameter. I did a series of undo's and found that the error first happens at
Step 16, when the <comp:ReservationForm /> is first added.

I created ReservationForm.mxml with the given code under the components
folder, as instructed.

Anybody have any ideas what the error is referring to? I definitely don't see
multiple instances of dataProvider being initialized.

Thanks!

The problem was that I had put the <comp:ReservationForm...> before the </mx:List> rather than after it. My bad. The error diagnosis got me chasing after the wrong thing.