"Unable to cast object of type 'System.String' to type 'Microsoft.Group.Policy.Reporting.Extensions.Registry.RegistryValue'." error message when you try to generate a report for a GPO

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Article ID: 2409336 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You have a computer that is running one of the following operating systems:
    • Windows Vista
    • Windows Server 2008
    • Windows 7
    • Windows Server 2008 R2
  • You use the Group Policy Management Console (GPMC) to connect to a domain controller from the computer.
  • You select a Group Policy object (GPO), and then you disable the Windows Firewall: Allow Logging Group Policy setting in the following path:
    Computer Configuration\Administrative Templates\Network\Network Connections\Windows Firewall\Domain Profile
  • You try to generate a report for the GPO in GPMC.
In this scenario, you receive the following error message:
An error occurred while generating report:

Unable to cast object of type 'System.String' to type 'Microsoft.Group.Policy.Reporting.Extensions.Registry.RegistryValue'.
Note You can use either of the following methods to generate a report for a GPO in the GPMC MMC snap-in:
  • Method 1: Select the Group Policy object, and then click the Settings tab in the panel on the right side.
  • Method 2: Run the Group Policy Results Wizard.

CAUSE

The issue occurs because the GPMC treats the Group Policy-related registry value as a string. This causes an unhandled invalid cast exception during type cast conversion when GPMC is generating the GPO report.

RESOLUTION

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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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 website:
http://support.microsoft.com/contactus/?ws=support
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.

Prerequisites

To apply this hotfix, you must be running one of the following operating systems:
  • Windows Vista Service Pack 2 (SP2)
  • Windows Server 2008 Service Pack 2 (SP2)
  • Windows 7
  • Windows Server 2008 R2
Additionally, you must have Remote Server Administration Tools (RSAT) installed on the computer that is running Windows Vista or Windows 7.
For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
968849 How to obtain the latest service pack for Windows Server 2008

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

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

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Vista and Windows Server 2008 file information notes
Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.0.600 2 . 22xxxWindows Vista and Windows Server 2008SP2LDR
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Microsoft.grouppolicy.serveradmintools.reporting.dll6.0.6002.226051,654,78410-Mar-201108:52x86
Microsoft.grouppolicy.serveradmintools.interop.dll6.0.6002.22605142,84810-Mar-201108:52x86
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Microsoft.grouppolicy.serveradmintools.interop.dll6.0.6002.22605148,48010-Mar-201108:49x64
Microsoft.grouppolicy.serveradmintools.reporting.dll6.0.6002.226051,654,78410-Mar-201108:49x86
Microsoft.grouppolicy.serveradmintools.interop.dll6.0.6002.22605142,84810-Mar-201108:49x86
For all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Microsoft.grouppolicy.serveradmintools.interop.dll6.0.6002.22605163,32810-Mar-201108:45IA-64
Microsoft.grouppolicy.serveradmintools.reporting.dll6.0.6002.226051,654,78410-Mar-201108:45x86
Microsoft.grouppolicy.serveradmintools.interop.dll6.0.6002.22605142,84810-Mar-201108:45x86
Windows 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.1.760 0 . 20xxxWindows 7 and Windows Server 2008 R2RTMLDR
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Microsoft.grouppolicy.reporting.dll6.1.7600.207971,851,39210-Sep-201004:46x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Microsoft.grouppolicy.reporting.dll6.1.7600.207971,851,39210-Sep-201004:46x86
For all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Microsoft.grouppolicy.reporting.dll6.1.7600.207971,851,39210-Sep-201004:46x86

STATUS

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

MORE INFORMATION

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

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameMsil_microsoft.grouppoli..dmintools.reporting_31bf3856ad364e35_6.0.6002.22605_none_2d9b6092a1038691.manifest
File versionNot Applicable
File size5,196
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size2,253
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
File nameX86_microsoft.grouppoli..radmintools.interop_31bf3856ad364e35_6.0.6002.22605_none_e070888e28472319.manifest
File versionNot Applicable
File size7,758
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameAmd64_microsoft.grouppoli..radmintools.interop_31bf3856ad364e35_6.0.6002.22605_none_3c8f2411e0a4944f.manifest
File versionNot Applicable
File size7,786
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
File nameMsil_microsoft.grouppoli..dmintools.reporting_31bf3856ad364e35_6.0.6002.22605_none_2d9b6092a1038691.manifest
File versionNot Applicable
File size5,196
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size2,269
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
File nameX86_microsoft.grouppoli..radmintools.interop_31bf3856ad364e35_6.0.6002.22605_none_e070888e28472319.manifest
File versionNot Applicable
File size7,758
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
Additional files for all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameIa64_microsoft.grouppoli..radmintools.interop_31bf3856ad364e35_6.0.6002.22605_none_e0722c8428452c15.manifest
File versionNot Applicable
File size7,772
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
File nameMsil_microsoft.grouppoli..dmintools.reporting_31bf3856ad364e35_6.0.6002.22605_none_2d9b6092a1038691.manifest
File versionNot Applicable
File size5,196
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size1,585
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable
File nameX86_microsoft.grouppoli..radmintools.interop_31bf3856ad364e35_6.0.6002.22605_none_e070888e28472319.manifest
File versionNot Applicable
File size7,758
Date (UTC)10-Mar-2011
Time (UTC)09:01
PlatformNot Applicable

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameMsil_microsoft.grouppolicy.reporting_31bf3856ad364e35_6.1.7600.20797_none_4a6438e5259bc7da.manifest
File versionNot Applicable
File size2,860
Date (UTC)10-Sep-2010
Time (UTC)05:03
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size1,653
Date (UTC)10-Sep-2010
Time (UTC)08:00
PlatformNot Applicable
File nameX86_eadd938e7b841a7c626889d595543c85_31bf3856ad364e35_6.1.7600.20797_none_c883825b61bf9880.manifest
File versionNot Applicable
File size702
Date (UTC)10-Sep-2010
Time (UTC)08:00
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_eadd938e7b841a7c626889d595543c85_31bf3856ad364e35_6.1.7600.20797_none_24a21ddf1a1d09b6.manifest
File versionNot Applicable
File size704
Date (UTC)10-Sep-2010
Time (UTC)08:00
PlatformNot Applicable
File nameMsil_microsoft.grouppolicy.reporting_31bf3856ad364e35_6.1.7600.20797_none_4a6438e5259bc7da.manifest
File versionNot Applicable
File size2,860
Date (UTC)10-Sep-2010
Time (UTC)05:03
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size1,663
Date (UTC)10-Sep-2010
Time (UTC)08:00
PlatformNot Applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameIa64_eadd938e7b841a7c626889d595543c85_31bf3856ad364e35_6.1.7600.20797_none_c885265161bda17c.manifest
File versionNot Applicable
File size703
Date (UTC)10-Sep-2010
Time (UTC)08:00
PlatformNot Applicable
File nameMsil_microsoft.grouppolicy.reporting_31bf3856ad364e35_6.1.7600.20797_none_4a6438e5259bc7da.manifest
File versionNot Applicable
File size2,860
Date (UTC)10-Sep-2010
Time (UTC)05:03
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size1,460
Date (UTC)10-Sep-2010
Time (UTC)08:00
PlatformNot Applicable

Properties

Article ID: 2409336 - Last Review: April 22, 2011 - Revision: 2.0
APPLIES TO
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 for Itanium-Based Systems
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
  • Windows 7 Enterprise
  • Windows 7 Professional
  • Windows 7 Ultimate
  • Windows Vista Business
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Ultimate
  • Windows Vista Ultimate 64-bit Edition
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 Standard
  • Windows Server 2008 Standard without Hyper-V
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbexpertiseadvanced KB2409336

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