I am just learning Flex and trying to connect it to Salesforce.com web
services. I created a very basic sample app, but I cannot get it to do anything
as I continually get this Error #1009 (see output below). I have no idea what I
am doing wrong, I actually followed a video step-by-step and still can't get
this to work.

TypeError: Error #1009: Cannot access a property or method of a null object
reference.
at
mx.utils::URLUtil$/getProtocol()[E:\dev\3.1.0\frameworks\projects\rpc\src\mx\uti
ls\URLUtil.as:199]
at
com.salesforce::Connection/_invoke()[/home/jamesw/projects/mavericks/sdk/src/com
/salesforce/Connection.as:1015]
at
com.salesforce::Connection/invoke()[/home/jamesw/projects/mavericks/sdk/src/com/
salesforce/Connection.as:972]
at
com.salesforce::Connection/query()[/home/jamesw/projects/mavericks/sdk/src/com/s
alesforce/Connection.as:467]
at main/render()[/Users/MFidler_Work/Documents/Flex Builder 3/Flex Sample
App/src/main.mxml:22]
at
main/___main_Application1_applicationComplete()[/Users/MFidler_Work/Documents/Fl
ex Builder 3/Flex Sample App/src/main.mxml:2]
at flash.events::EventDispatcher/dispatchEventFunctio n()
at flash.events::EventDispatcher/dispatchEvent()
at
mx.core::UIComponent/dispatchEvent()[E:\dev\3.1.0\frameworks\projects\framework\
src\mx\core\UIComponent.as:9156]
at
mx.managers::SystemManager/preloader_preloaderDone Handler()[E:\dev\3.1.0\framewo
rks\projects\framework\src\mx\managers\SystemManag er.as:2265]
at flash.events::EventDispatcher/dispatchEventFunctio n()
at flash.events::EventDispatcher/dispatchEvent()
at
mx.preloaders::Preloader/displayClassCompleteHandl er()[E:\dev\3.1.0\frameworks\p
rojects\framework\src\mx\preloaders\Preloader.as:4 34]
at flash.events::EventDispatcher/dispatchEventFunctio n()
at flash.events::EventDispatcher/dispatchEvent()
at
mx.preloaders:ownloadProgressBar/timerHandler()[E:\dev\3.1.0\frameworks\projec
ts\framework\src\mx\preloaders\DownloadProgressBar .as:1451]
at
mx.preloaders:ownloadProgressBar/initCompleteHan dler()[E:\dev\3.1.0\frameworks
\projects\framework\src\mx\preloaders\DownloadProg ressBar.as:1503]
at flash.events::EventDispatcher/dispatchEventFunctio n()
at flash.events::EventDispatcher/dispatchEvent()
at
mx.preloaders::Preloader/dispatchAppEndEvent()[E:\dev\3.1.0\frameworks\projects\
framework\src\mx\preloaders\Preloader.as:291]
at
mx.preloaders::Preloader/appCreationCompleteHandle r()[E:\dev\3.1.0\frameworks\pr
ojects\framework\src\mx\preloaders\Preloader.as:44 2]
at flash.events::EventDispatcher/dispatchEventFunctio n()
at flash.events::EventDispatcher/dispatchEvent()
at
mx.core::UIComponent/dispatchEvent()[E:\dev\3.1.0\frameworks\projects\framework\
src\mx\core\UIComponent.as:9156]
at mx.core::UIComponent/set
initialized()[E:\dev\3.1.0\frameworks\projects\framework\src\mx\ core\UIComponent
..as:1167]
at
mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\3.1.0\frameworks\proje
cts\framework\src\mx\managers\LayoutManager.as:701]
at Function/http://adobe.com/AS3/2006/builtin::apply( )
at
mx.core::UIComponent/callLaterDispatcher2()[E:\dev\3.1.0\frameworks\projects\fra
mework\src\mx\core\UIComponent.as:8565]
at
mx.core::UIComponent/callLaterDispatcher()[E:\dev\3.1.0\frameworks\projects\fram
ework\src\mx\core\UIComponent.as:8508]


<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
xmlns:salesforce="com.salesforce.*" applicationComplete="render();">

<mx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import com.salesforce.results.QueryResult;
import com.salesforce.AsyncResponder;

private function render():void {
apex.query("Select Id, Name From Account limit 30",
new AsyncResponder(
function(qr:QueryResult):void
{
var ar:ArrayCollection = new ArrayCollection();
for (var j:int=0;j<qr.records.length;j++) {
ar.addItem( {Id:qr.records[j].Id, Name:qr.records[j].Name});
}
bg.columns = [new DataGridColumn('Id'), new DataGridColumn('Name')];
bg.dataProvider = ar;
},
function (fault:Object):void {

}
));
}

]]>
</mx:Script>

<salesforce:Connection id="apex" />
<mxataGrid id="bg" x="0" y="0" width="100%" height="100%">
<mx:columns>
<mxataGridColumn headerText="Id" dataField="col1"/>
<mxataGridColumn headerText="Name" dataField="col2"/>
</mx:columns>
</mxataGrid>

</mx:Application>

You are not providing an url for the salesforce connection. I tried:
serverUrl="https://test.salesforce.com/services/So ap/u/9.0"

Also, finish the fault handler code, maybe just with:
Alert.show(fault.toString(), "fault");

Those will let you try to conect with SF, but it returns an error.

Do you not require some authentication to access that service?

Tracy

I got this to work using a client's account. The modified code is below.
Tracy


<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical"
xmlns:salesforce="com.salesforce.*" >

<mx:Script><![CDATA[
import mx.collections.ArrayCollection;
import com.salesforce.results.QueryResult;
import com.salesforce.objects.LoginRequest;
import com.salesforce.AsyncResponder;
import mx.controls.Alert;

public var sf_username:String = "MyUserName";
public var sf_password:String = "MyPassword";

private function login():void
{
var lr:LoginRequest = new LoginRequest();
lr.username = sf_username;
lr.password = sf_password;
lr.callback = new AsyncResponder(this.getData, this.handleFault);
apex.login(lr);
}//login

private function handleFault(fault:Object):void {
Alert.show(fault.toString());
}

private function getData(lr:Object):void {
apex.query("Select Id, Name From Account limit 30", new
AsyncResponder(onResult,handleFault));
}//render

private function onResult(qr:QueryResult):void
{
var ar:ArrayCollection = new ArrayCollection();
for (var j:int=0;j<qr.records.length;j++) {
ar.addItem( {Id:qr.records[j].Id, Name:qr.records[j].Name});
}
bg.columns = [new DataGridColumn('Id'), new DataGridColumn('Name')];
bg.dataProvider = ar;
}

]]></mx:Script>

<salesforce:Connection id="apex"
serverUrl="https://test.salesforce.com/services/So ap/u/9.0" />
<mx:Button label="Login" click="login()" />
<mxataGrid id="bg" x="0" y="0" width="100%" height="100%">
<mx:columns>
<mxataGridColumn headerText="Id" dataField="col1"/>
<mxataGridColumn headerText="Name" dataField="col2"/>
</mx:columns>
</mxataGrid>

</mx:Application>

Yes, I found the example you used and you skipped the login part.
Tracy

Finally, I set up my account and got connected using the above code. I had to change the server url to:
http://www.salesforce.com/services/Soap/u/10.0

Tracy