Rich
>Is there a limit to the number of cursors in a form's dataenvironment?

Yes there is a limit. There are only 32,767 work areas available so if you try to opne the 32,768th cursor it will error on you.

>Is there a limit to total objects, cursors plus relations?

The number of objects is limited by the number of names available which I think is somewhere around 64,000 or so.