this.getIframeWin() has no properties

I'm evaluating Dynarch, but I get this error when I use

this.getIframeWin() has no properties
http://localhost/test/dynarch/js/thelib.js
Line 11

This seems to work:

I Have DlDesktop -> DlLayout -> Notebook -> DlContainer -> Rte.

What fails: instead of Rte I -> DlLayout -> DlContainer -> DlLayout -> DlContainer -> Rte. Then I get the error above.

It too many (3) nested layouts a problem?

I tried with 2 nested layouts but still get the problem.

Note: with one layout it works, but when I type text it's double spaced, which isn't what I wanted. I am certain the layout css is being loaded correctly.

I simply want a textarea that fills ("*") to the bottom, and to the right. I've given up on the DlEntry with "textarea" because the bottom calculations aren't correct and I can type below the visible area of the DlEntry...

Thanks for any comments. If I need to build a demo I will. I was hoping a simple description would be enough.

Thank you.

var rte = new DlRteFrame({ });
    rte.initDesignMode(function() {
        rte.loadStyle("/test/rte.css?" + new Date().getTime());
        rte.setHTML("<b>test</b>");
        //rte.focus();
    });
tLayout.packWidget(tBottom, { pos: "bottom"});
tLayout.packWidget(rte, { pos: "bottom", fill: "*"});