I have following flow of app : First screen is Login screen and if Login gets success the tab-group opens. here is code : app.js var win = Titanium.UI.createWindow ({ title:'User Login', url:'Login.js', tabBarHidden:true, backgroundColor:'gray', navBarHidden:false }); win.open(); Login.js var win = Ti.UI.currentWindow; // some UI controls loginBtn.addEventListener('click', function(e) { //calling