How to find out what the asp.net iis application is complaining about?

Question

SQL

Hello everyone, asp.net gives the following error

[NullReferenceException: Object reference not set to an instance of an object.]
   RP.WebUI.Arm1Search.SetDataSet(DataSet ds) +16
   RP.WebUI.Arm1Search.RestoreCriteria() +603
   RP.WebUI.Arm1Search.Page_Load(Object sender, EventArgs e) +975
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627

How can I understand in which file and in what place is this error?

Answer 1

Classic. A la "diagnosis by photo 16x16px".
Error in RP.WebUI.Arm1Search.SetDataSet(DataSet ds) method +16 instructions from method start. It's written.