On Jan 4, 10:23 pm, Nymor wrote:

Your LoadKml completes immediately, and then drops through to the rest
of the code - which fails (absent the "alert") because the kml hasnt
loaded yet.

Some time later, your finishLoadKml function executes. But thats too
late.

The "correct" way to use the callback would be something like
(untested):

function finishLoadKml(kmlObject) {
   // check if the KML was fetched properly
   if (kmlObject) {
                currentKmlObject = kmlObject;
                if (chkbox_linestringVisibility.checked) ge.getFeatures().appendChild
(currentKmlObject);
                obj_linestring_placemark = currentKmlObject;
                var la = ge.createLookAt('');

/* this code moved here from InitializeTour */
        var init_options = [];
        init_options.kmlModelUrl = kmlModelUrlBox.value;
        init_options.speed = SpeedBox.value - 0;
        init_options.range = AltitudeBox.value - 0;
        init_options.range = RangeBox.value - 0;
        init_options.tilt = TiltBox.value - 0;
        init_options.rotation = RotationBox.value - 0;

        init_pathtour(obj_linestring_placemark, init_options);

        } else {
     alert('Bad KML');
   }
 }

function InitialiseTour() {
        if (t_simulator) {
                t_simulator.destroy();
                clear_features();
        }

        kmlPathUrl = kmlPathUrlBox.value;
        //kmlModelUrl = kmlModelUrlBox.value;

        LoadKml(kmlPathUrl);

       /* rest of the code moved into finishLoadKml, because it
          hasnt finished loading until that executes */