Looking for help deciphering ASP.NET Err Msg

BrianWren · July 12th, 2005, 12:10 PM

I'm getting an error response in my app:

Code:

[NullReferenceException: Object reference not set to an instance of an object.]
   WF.wfv_view.Page_Load(Object sender, EventArgs e) +180
   System.Web.UI.Control.OnLoad(EventArgs e) +67
   System.Web.UI.Control.LoadRecursive() +35
   System.Web.UI.Page.ProcessRequestMain() +750

What do â+180,â â+67,â â+35â and â+750â mean?

How would this error be tracked down?

jbenson001 · July 12th, 2005, 12:22 PM

What is the line of code that throws the error?

BrianWren · July 12th, 2005, 03:12 PM

Thatâs what Iâm trying to track down...
I turned tracing on, and got this in trace.axd

Code:

aspx.page     Begin Init   
aspx.page     End Init
aspx.page     Begin LoadViewState
aspx.page     End LoadViewState
aspx.page     Begin ProcessPostData 
aspx.page     End ProcessPostData 
aspx.page     Begin ProcessPostData Second Try 
aspx.page     End ProcessPostData Second Try 
aspx.page     Begin Raise ChangedEvents 
aspx.page     End Raise ChangedEvents 
aspx.page     Begin Raise PostBackEvent
 
              Error executing child request for wfv_view.aspx.
                at System.Web.HttpServerUtility.ExecuteInternal(String path, TextWriter writer, Boolean preserveForm)
                at System.Web.HttpServerUtility.Transfer(String path, Boolean preserveForm)
                at WF.wfv_filter.btnSubmit_Click(Object sndr, EventArgs e)
Unhandled       at System.Web.UI.HtmlControls.HtmlInputButton.OnServerClick(EventArgs e)
Execution       at System.Web.UI.HtmlControls.HtmlInputButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
Error           at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
                at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
                at System.Web.UI.Page.ProcessRequestMain()

Status Code of the request is 500. (It appears a good process has a status code of 200.)

jbenson001 · July 13th, 2005, 12:25 AM

Is this happening on the inital page load or during a post back?