try {
	// Create a new top-level subform
	var vSF = xfa.template.createNode("subform", "topLevel");
	vSF.w = "6in";
	vSF.h = "2in";
	// Designer gets fairly upset if there are no master pages
	vSF.loadXML('<pageSet><pageArea name="Page1"><contentArea x="0.25in" y="0.25in" w="8in" h="10.5in"/><medium stock="letter" short="8.5in" long="11in"/></pageArea></pageSet>', false);	

	vSF.loadXML('<draw name="T1" y="10mm" x="10mm"><ui><textEdit/></ui><value><text>New Top Level Subform</text></value><font typeface="Myriad Pro"/></draw>', false);
	xfa.template.nodes.append(vSF);
} catch (e) {
    designer.println("error at line: " + e.line + ": " + e.toString());
    for (var p in e) {
        designer.println(p);
    }
}