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Editorial Team
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Asked: 2026-05-28T04:27:58+00:00

On rare occasion I get the following error and stack trace when someone access

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On rare occasion I get the following error and stack trace when someone access one of my ASP.NET applications:

Error: Object reference not set to an instance of an object.

Stacktrace: at MyApp.MyDefaultPage.Page_Init(Object sender, EventArgs e) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

OK a few things here. MyApp.MyDefaultPage does not have a defined Page_Init of my own so there is no additional code (I understand the event still fires). Also there is no base class code which it would run through either in a Page_Init event, so I am at a loss from where this is occuring.

The only thing I could even gather is I have a Global.asax exception handler code in the Application_Error event, but the 1st thing I do before accessing any objects is make sure they are Not Nothing before trying to access (to prevent any errors).

Any clue as to what could cause this sporadically?

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1 Answer

  1. Editorial Team

    Are you using any of the Ajax controls?

    If so make sure your scriptmanager tag is the first item after your form tag

    also give a try to setting EnableEventValidation=”false” for the page.

    It could be caused by user interaction with the page before the page is fully loaded.

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