SharePoint 2010 and WebPart issue after .NET fix now solved

In case you installed the .NET Framework 3.5.1 hotfix KB2844286 (security bulletin MS13-052) on a SharePoint 2010 environment and got an error message when using a WebPart, an updated hotfix package is now available.

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)


Please go to and install the updated hotfix package.

More information you can find also here: MS13-052: Description of the security update for the .NET Framework 3.5.1 on Windows 7 Service Pack 1 and Windows Server 2008 R2 Service Pack 1: July 9, 2013

It might be also recommended to install this re-released hotfix on all computers because this .NET feature XslCompiledTransform will be used by a lot of applications.


Update 14/Aug/2013: Updated article

With August Security fix updates we got new packages for Windows Server 2008R2.

Please refer to the updated information in

Comments (1)

  1. If you are looking for SharePoint 2013 issues please check the new blog post of my colleague:…/3587795.aspx

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