Framecount of symbol on main timeline with jsfl

1

I’m trying to get the frame count of the timeline of a movieclip that is on the frist frame of the main timeline of a .fla file with jsfl.


fl.openDocument(fileURL);
var dom = fl.getDocumentDOM();
var timeline = dom.getTimeline();

//this traces movieclip
fl.trace(timeline.layers[0].frames[0].elements[0].symbolType);

//this traces undefined 
fl.trace(timeline.layers[0].frames[0].elements[0].frameCount);

any ideas?

thanks in advance!