FIX: Error message when a Web application that is not run at the Full Trust level uses the Visual Studio 2008 ReportViewer control: "System.Security.SecurityException: That assembly does not allow partially trusted callers"


Consider the following scenario:
  • You create a Web application that is not run at the Full Trust level.
  • The application uses the Microsoft Visual Studio 2008 ReportViewer control (ReportViewer 9.0) on a Web page.
  • You try to view this Web page.
In this scenario, you receive the following error message:
System.Security.SecurityException: That assembly does not allow partially trusted callers.
Note This problem does not occur if the application uses the Visual Studio 2005 ReportViewer control (ReportViewer 8.0).


Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


You must have Visual Studio 2008 Service Pack 1 (SP1) installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
File nameFile versionFile sizeDateTimePlatform
fl_microsoft_reportviewer_localprint_cab_120652_120652_x86.lnNot Applicable236,47106-Feb-201006:10Not Applicable


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates