Newbie question: I have a bare-bones Architect 2 Application...
*) with a single Viewport
*) that contains just one TreePanel
*) that is bound to a single, simple TreeStore
*) that has an equally simple Model and a trivial JSON file

Everything displays correctly inside Architect 2, but when I save the project and then look at the Preview, I see only the TreePanel header, yet not the contents of the TreeStore. It would seem that the tree information isn't being rendered, but I cannot figure out why (btw -- 'autoLoad' is set to 'true' in the TreeStore).

However, the standard Tree examples all display correctly, plus I have not seen any similar threads in the Forum...

So I suspect (and I hope!) I am missing something obvious in my application -- any thoughts, anyone?

TIA --