hello friends, I have implemented one Flex application in which I want to display 3D google map.In which I am getting the error the NUll object reference during map display. Here is my code:- import com.google.maps.controls.MapTypeControl; import adobe.utils.XMLUI; import mx.rpc.events.FaultEvent; import mx.controls.Alert; import generated.webservices.*; import mx.collections.ArrayCollection; import mx.controls.*; import generated.webservices.*; import com.google.maps.LatLng; import com.google.maps.Map3D; import com.google.maps.MapEvent; import com.google.maps.MapMouseEvent; import com.google.maps.services.GeocodingEvent; import com.google.maps.services.ClientGeocoder; import com.google.maps.overlays.Marker; import com.google.maps.InfoWindowOptions; import com.google.maps.MapOptions; import com.google.maps.MapType; import com.google.maps.View; import com.google.maps.controls.NavigationControl; import com.google.maps.geom.Attitude; import mx.controls.Alert; [Bindable] private var childName:ArrayCollection; [Bindable] private var childId:ArrayCollection; private var photoFeed:ArrayCollection; private var trackinginfochild:TrackingInfo; private var arrayOfchild:Array; private var newEntry:GetSBTSMobileAuthentication; private var trackinginfo:GetSBTSTrackingInfo; private var childObj:Child; private var UserId:int; private var lat:int; private var long:int; private var latlong:LatLng; public var user:SBTSWebService; public function authentication():void { // Instantiate a new Entry object. user = new SBTSWebService(); if(user!=null) { user.addSBTSWebServiceFaultEventListener(handleFaults); user.addgetSBTSMobileAuthenticationEventListener(authenticationResult); newEntry = new GetSBTSMobileAuthentication(); if(newEntry!=null) { newEntry.mobile=mobileno.text; newEntry.password=password.text; user.getSBTSMobileAuthentication(newEntry); } } } public function handleFaults(event:FaultEvent):void { Alert.show("A fault occured contacting the server. Fault message is: " + event.fault.faultString); } public function authenticationResult(event:GetSBTSMobileAuthenticationResultEvent):void { if(event.result != null && event.result._return>0) { if(event.result._return > 0) { UserId = event.result._return; loginform.enabled = false; getChildList(UserId); viewstack2.selectedIndex=1; } else { Alert.show("Authentication fail"); } } } public function getChildList(userId:int):void { var childEntry:GetSBTSMobileChildrenInfo = new GetSBTSMobileChildrenInfo(); childEntry.UserId = userId; user.addgetSBTSMobileChildrenInfoEventListener(sbtsChildrenInfoResult); user.getSBTSMobileChildrenInfo(childEntry); } public function sbtsChildrenInfoResult(event:GetSBTSMobileChildrenInfoResultEvent):void { if( event.result._return!=null) { arrayOfchild = event.result._return as Array; photoFeed = new ArrayCollection(arrayOfchild); childName = new ArrayCollection(); for( var count:int=0;count<photoFeed.length;count++) { childObj = photoFeed.getItemAt(count,0) as Child; childName.addItem(childObj.strName); } } } private function trackingInfo():void { for( var count:int=0;count user.getSBTSTrackingInfo(trackinginfo); } } } } private function getTrackingInfo(event:GetSBTSTrackingInfoResultEvent):void { if(event.result._return != null) { trackinginfochild = event.result._return as TrackingInfo; lat = trackinginfochild.dblLatitude; long = trackinginfochild.dblLongitude; latlong = new LatLng(lat,long); } } private function onMapPreinitialize(event:MapEvent):void { var myMapOptions:MapOptions = new MapOptions(); myMapOptions.zoom = 12; myMapOptions.center = latlong; myMapOptions.mapType = MapType.NORMAL_MAP_TYPE; myMapOptions.viewMode = View.VIEWMODE_PERSPECTIVE; myMapOptions.attitude = new Attitude(20,30,0); buslocation.setInitOptions(myMapOptions); buspath.setInitOptions(myMapOptions); } private function onMapReady(event:MapEvent):void { this.buslocation.addControl(new NavigationControl()); this.buslocation.addControl( new MapTypeControl()); } ]]> <mx:Move id="hideEffect" yTo="-500" /> <mx:Move id="showEffect" xFrom="500"/> <mx:Panel width="100%" height="100%" headerColors="[#000000,#FFFFFF]" hideEffect="{hideEffect}" showEffect="{showEffect}"> <mx:TabNavigator id="viewstack2" selectedIndex="0" creationPolicy="all" width="100%" height="100%"> <mx:Form label="Login Form" id="loginform" hideEffect="{hideEffect}" showEffect="{showEffect}"> <mx:FormItem label="Mobile NO:" creationPolicy="all"> <mx:TextInput id="mobileno"/> </mx:FormItem> <mx:FormItem label="Password:" creationPolicy="all"> <mx:TextInput displayAsPassword="true" id="password" /> </mx:FormItem> <mx:FormItem> <mx:Button label="Login" click="authentication()"/> </mx:FormItem> </mx:Form> <mx:Form label="Child List" id="childForm" hideEffect="{hideEffect}" showEffect="{showEffect}"> <mx:Label width="100%" color="blue" text="Select Child."/> <mx:RadioButtonGroup id="radioGroup" itemClick="trackingInfo()"/> <mx:Repeater id="fieldRepeater" dataProvider="{childName}"> <mx:RadioButton groupName="radioGroup" label="{fieldRepeater.currentItem}" value="{fieldRepeater.currentItem}"/> </mx:Repeater> </mx:Form> <mx:Form label="Child Information" hideEffect="{hideEffect}" showEffect="{showEffect}"> <mx:FormItem> <mx:DataGrid id="childinfo"> <mx:columns> <mx:DataGridColumn headerText="Child Name" dataField="strName"/> <mx:DataGridColumn headerText="School Name" dataField="strSchoolName"/> <mx:DataGridColumn headerText="Pick Up Point" dataField="strPickUpPointName"/> <mx:DataGridColumn headerText="Drop Down Point" dataField="strDropDownPointName"/> </mx:columns> </mx:DataGrid> </mx:FormItem> <mx:FormItem> <mx:Button label="click here to see bus location"/> </mx:FormItem> </mx:Form> <mx:Form label="Bus Location" hideEffect="{hideEffect}" showEffect="{showEffect}"> <maps:Map3D xmlns:maps="com.google.maps.*" mapevent_mappreinitialize="onMapPreinitialize(event)" id="buslocation" width="100%" height="100%" url="http://code.google.com/apis/maps/" key="ABQIAAAAXuX6aG-r_N0-tQNxUEV-vRSE8al1BQssMxLXJiP75kIjR3ssLxT3D52_u94hI-dMIkD72FmnK-P4og"/> </mx:Form> <mx:Form label="Bus path" hideEffect="{hideEffect}" showEffect="{showEffect}"> <maps:Map3D xmlns:maps="com.google.maps.*" mapevent_mappreinitialize="onMapPreinitialize(event)" id="buspath" width="100%" height="100%" url="http://code.google.com/apis/maps/" key="ABQIAAAAXuX6aG-r_N0-tQNxUEV-vRSE8al1BQssMxLXJiP75kIjR3ssLxT3D52_u94hI-dMIkD72FmnK-P4og"/> </mx:Form> </mx:TabNavigator> </mx:Panel> I am getting this error :- TypeError: Error #1009: Cannot access a property or method of a null object reference. at com.google.maps.geom::Geometry$/computeSeparatingAxes() at com.google.maps.geom::TileEnumerator/enumerateTiles() at com.google.maps.core::PerspectiveTilePane/computeOptimalSet() at com.google.maps.core::PerspectiveTilePane/render() at com.google.maps.core::PerspectiveTilePane/configure() at com.google.maps.managers::PerspectiveTileManager/updateView() at com.google.maps.managers::PerspectiveTileManager/initializePanes() at com.google.maps.managers::PerspectiveTileManager/onInitialize() at MethodInfo-190() at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:9298] at com.google.maps.wrappers::BaseEventDispatcher/dispatchEvent() at com.google.maps.wrappers::EventDispatcherWrapper/dispatchEvent() at com.google.maps.core::MapImpl/size() at com.google.maps.core::MapImpl/setSize() at com.google.maps.wrappers::IMapWrapper/setSize() at com.google.maps::Map/internalSetSize() at com.google.maps::Map/onUIComponentResized() at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:9298] at mx.core::UIComponent/dispatchResizeEvent()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:7077] at mx.core::UIComponent/setActualSize()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:6706] at mx.containers.utilityClasses::BoxLayout/updateDisplayList()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\containers\utilityClasses\BoxLayout.as:219] at mx.containers::Form/updateDisplayList()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\containers\Form.as:375] at mx.core::UIComponent/validateDisplayList()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:6351] at mx.core::Container/validateDisplayList()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:2677] at mx.managers::LayoutManager/validateDisplayList()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:622] at mx.managers::LayoutManager/doPhasedInstantiation()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:695] at Function/http://adobe.com/AS3/2006/builtin::apply() at mx.core::UIComponent/callLaterDispatcher2()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8628] at mx.core::UIComponent/callLaterDispatcher()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8568] Please resolve my issue.