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Asked: 2026-05-11T21:31:46+00:00

We started getting the ‘Object reference not set to an instance of an object’

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We started getting the ‘Object reference not set to an instance of an object’ error when accessing any reports in our SQL Server 2005 Reporting Services.
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If we go to the report designer and debug it, it works.

I haven’t worked much with reporting services, and I don’t really know where to start looking. How can I track down the problem?

EDIT

These reports have been working for months. They just suddenly started showing this error.

EDIT 2

Found this in event viewer:

Event Type:    Warning
Event Source:   ASP.NET 2.0.50727.0
Event Category: Web Event 
Event ID:   1309
Date:       6/11/2009
Time:       10:01:06 AM
User:       N/A
Computer:   CHONGA
Description:
Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 6/11/2009 10:01:06 AM 
Event time (UTC): 6/11/2009 2:01:06 PM 
Event ID: 42be336a7b014eab84402a885be04fc2 
Event sequence: 437 
Event occurrence: 28 
Event detail code: 0 
 
Application information: 
    Application domain: /LM/W3SVC/10/root/Reports-7-128891533489230722 
    Trust level: RosettaMgr 
    Application Virtual Path: /Reports 
    Application Path: C:\Program Files\Microsoft SQL Server\MSSQL.3\Reporting Services\ReportManager\ 
    Machine name: CHONGA
 
Process information: 
    Process ID: 4948 
    Process name: w3wp.exe 
    Account name: NT AUTHORITY\NETWORK SERVICE 
 
Exception information: 
    Exception type: NullReferenceException 
    Exception message: Object reference not set to an instance of an object. 
 
Request information: 
    Request URL: http://chonga/Reports/Reserved.ReportViewerWebControl.axd?OpType=StyleSheet&Version=2005.090.1399.00 
    Request path: /Reports/Reserved.ReportViewerWebControl.axd 
    User host address: 127.0.0.1 
    User: CHONGA\Administrator 
    Is authenticated: True 
    Authentication Type: Negotiate 
    Thread account name: NT AUTHORITY\NETWORK SERVICE 
 
Thread information: 
    Thread ID: 1 
    Thread account name: NT AUTHORITY\NETWORK SERVICE 
    Is impersonating: True 
    Stack trace:    at Microsoft.Reporting.WebForms.WebRequestHelper.GetExceptionForMoreInformationNode(XmlNode moreInfo, XmlNamespaceManager namespaces)
   at Microsoft.Reporting.WebForms.WebRequestHelper.ExceptionFromWebResponse(Exception e)
   at Microsoft.Reporting.WebForms.ServerReport.ServerUrlRequest(Boolean isAbortable, String url, Stream outputStream, String& mimeType, String& fileNameExtension)
   at Microsoft.Reporting.WebForms.ServerReport.GetStyleSheet(String styleSheetName)
   at Microsoft.Reporting.WebForms.ReportServerStyleSheetOperation.PerformOperation(NameValueCollection urlQuery, HttpResponse response)
   at Microsoft.Reporting.WebForms.HttpHandler.ProcessRequest(HttpContext context)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
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  1. Editorial Team
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