quote Martin Oxenham:
In Illustrator the Stroke is the outline. Thats how you make an outline in Illustrator and why you have to convert it in Flexi.
The stroke isn’t an outline hence the need to convert the stroke as posted buy Martin G, also John you may already know but you can create an outline from a path without creating a stroke and then converting it by highlighting the path you want to outline and then selecting Object>Path>Offset Path, this creates a vector outline around the selected path.