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Article ID: 2872441 - Last Review: August 13, 2013 - Revision: 4.0

Notice
August 13, 2013 This article has been updated. We recommend that you apply the updated security update mentioned in the "Resolution" section.

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Symptoms

You may receive the following exception while executing web parts in Microsoft SharePoint applications:
Error while executing web part: System.NullReferenceException: Object reference not set to an instance of an object.
at System.Xml.Xsl.XslCompiledTransform.Load(MethodInfo executeMethod, Byte[] queryData, Type[] earlyBoundTypes)
at Microsoft.Xslt.STransform.GetCompiledTransform()
at Microsoft.SharePoint.WebPartPages.BaseXsltListWebPart.LoadXslCompiledTransform(WSSXmlUrlResolver someXmlResolver)
at Microsoft.SharePoint.WebPartPages.DataFormWebPart.GetXslCompiledTransform()
at Microsoft.SharePoint.WebPartPages.DataFormWebPart.PrepareAndPerformTransform(Boolean bDeferExecuteTransform)

Cause

This problem occurs because of a functional issue in the .NET Framework 3.5.1.

Resolution

To resolve this problem, apply the updated security update 2844286  (http://support.microsoft.com/kb/2844286/ ) .

Applies to

This article applies to the following:
  • Microsoft .NET Framework 3.5.1 when used with:
    • Windows 7 Service Pack 1
    • Windows Server 2008 R2 Service Pack 1
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