If I understand correctly, you are trying to use Loader directly in QML.
The other thread shows how to do this in C++.
You can use classes documented here:
https://developer.blackberry.com/cascades/reference/classes.html
So the error actually is correct and is not misleading: it claims Loader is not a class because Loader is not a class.
Look at sample stampcollector.
Note the lines:
QmlDocument *qml = QmlDocument::create().load("main.qml");
and
QmlDocument *contentQml = QmlDocument::create().load("ContentPage.qml");
So this loads both pages separately in C++. Use the objectName to find the pane (e.g. navigation pane) that you want to update with the new page. Samples stampcollector shows how to do that.
Does this answer the question? If so, please mark as solution. If not, can you clarify exactly where you need help?
Stuart
