Android Application crashes badly on adding mapview.

I am trying to create a mapview in tabbar window but my application crashes badly whenever I try to add mapview. I even try to add to add a view and add my mapview onto it and add that view onto window but application is still crashes sometime randomly. My focus is being called twice I am enclosing my code as below aswell. Looking for urgent suggestions.

var mapview = Titanium.Map.createView({
    top:0,
    height: 391,
    mapType: Titanium.Map.STANDARD_TYPE,
    region:{latitude:latStr, longitude:lonStr, latitudeDelta:0.2, longitudeDelta:0.2},
    animate:true,
    regionFit:true,
    userLocation:false,
    //annotations:[atlanta1,appleAnn],
});
 
 
if (latStr || lonStr) {
 
    mapview.region = {latitude:latStr, longitude:lonStr, latitudeDelta:0.2, longitudeDelta:0.2};    
}
 
if (!appleAnn) {
    mapview.annotations = [atlanta1];
} else {
    if (atlanta1) {
        mapview.annotations = [atlanta1,appleAnn];
    }
}
//win4.add(mapview);    //  Applications crashes whenever I visit map tab

So I add mapview in focus as

var mapHolder = Ti.UI.createView({
    size:{height:391, width:'auto'},
    top:86,
    left:0,
    //backgroundImage:'../images/bkg-header.png',
    backgroundColor:'#000',
    modal:true,
    //borderColor:'blue',
    zIndex:0
});
win4.add(mapHolder);
 
 
var mapCheck = false;
var focusCheck = false;
 
win4.addEventListener('focus', function(e) {
 
 if (focusCheck == false) {
 
        if (mapview)
        {
            var children = mapHolder.children.slice(0);
 
            for (var i = 0; i < children.length; ++i) {
                mapHolder.remove(children[i]);
            }
        }
 
        //alert('focus Check');
        mapCheck = true;
        focusCheck = true;
 
        mapHolder.add(mapview);
 
        /*if (mapview) {
            win4.remove(mapview);
        }
        win4.add(mapview);*/
 
     }
})

But my code for adding mapview didnt workout and event Listener 'open' is also not being callled. I m bit frustrated that why mapview is creating crahes on Android, although all annotations work is also being done.