Hi 99 times out of 100 when i go into debug i get the error below. to clear it i can use F5 once  to several times, the page  eventually loads. i suspect it's something to do with AJAX (as i never had this problem  before i  started creating ajax asp websites. The error normal means an error in my code so have i misssed something? has anyone else experienced this?

thanks dan

Server Error in '/crTester' Application.

---

Object reference not set to an instance of an object.

[NullReferenceException: Object reference not set to an instance of an object.]
   System.Web.Script.Services.WebServiceData.GetWebServiceData(HttpContext context, String virtualPath, Boolean failIfNoData, Boolean pageMethods) +368
   System.Web.Script.Services.PageClientProxyGenerator.GetClientProxyScript(HttpContext context, IPage page, Boolean debug) +45
   System.Web.UI.ScriptManager.RegisterServices() +728
   System.Web.UI.ScriptManager.OnPagePreRenderComplete(Object sender, EventArgs e) +244
   System.Web.UI.Page.OnPreRenderComplete(EventArgs e) +2012724
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1566

does this service collect anything from the web.config?  or maybe is's looking for some application wide object which hasn't been created yet?

What code are you suing for for your web service? 

Object reference not set to an instance of an object.

can mean anything in all honesty.  Try adding a global.asax to your project, override the Application_Start event and step through the app load from there to find out what isn;t happening
 

hi, I have a couple of connection strings in my web.config, nothing unusual really. There are no events in the glabal.asax application_start event (some sessions in session_start though). The website is in VB.

How would i override the application_start event? 

thanks

dan 

I made a VB website and added a global.asax and all my events were overidden by default, weird.  VB is a bit patchy tho lol, but I'm biased being a C# head through and through :¬)

 I got this from mine anyway, hope it helps. Add a breakpoint on the Dim strSomeTrimg line and you should be able to follow the app as it loads.

Dim strSomeString = "Test"