"STATUS_OBJECT_NAME_NOT_FOUND" error message when you open a newly-created file in a shared folder in Windows 7 or in Windows Server 2008 R2

Symptoms

Consider the following scenario:

  • You enable the Server Message Block (SMB) version 2 directory cache on a computer that is running Windows 7 or Windows Server 2008 R2.

  • From the computer, you access a shared folder on a remote computer by using the SMB version 2 protocol.

In this scenario, the SMB version 2 directory cache may not update after a file is created in the shared folder. This behavior causes the next file-open operation on the newly-created file to display the following error message:

STATUS_OBJECT_NAME_NOT_FOUND


Cause

This issue occurs because of a timing issue in the SMB redirector (Mrxsmb20.sys). When this timing issue occurs, the directory cache is not updated accordingly when a file is created.


Resolution

To resolve this issue, install this hotfix on the affected computer that is running Windows 7 or Windows Server 2008 R2.

Note You can also resolve this issue by installing hotfix 2646563. Hotfix 2646563 includes this hotfix.

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 Web site:

http://support.microsoft.com/contactus/?ws=supportNote 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 7

  • Windows 7 Service Pack 1 (SP1)

  • Windows Server 2008 R2

  • Windows Server 2008 R2 Service Pack 1 (SP1)

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

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

Restart requirement

You must 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 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.

    Version

    Product

    SR_Level

    Service branch

    6.1.760
    0.
    21xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.
    21xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • 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

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.1.7600.21095

97,280

22-Nov-2011

03:32

x86

Mrxsmb20.sys

6.1.7601.21864

96,768

22-Nov-2011

03:22

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.1.7600.21095

128,512

22-Nov-2011

04:05

x64

Mrxsmb20.sys

6.1.7601.21864

128,000

22-Nov-2011

03:42

x64

For all supported IA-64–based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.1.7600.21095

312,832

22-Nov-2011

03:17

IA-64

Mrxsmb20.sys

6.1.7601.21864

310,784

22-Nov-2011

03:00

IA-64

Workaround

To work around this issue, disable the directory cache.

Note Disabling the directory cache may have a large, negative impact on performance. For more information about how to disable the directory cache, visit the following Microsoft website:

General information about SMB2 client redirector caches

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 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File name

Update.mum

File version

Not applicable

File size

2,773

Date (UTC)

22-Nov-2011

Time (UTC)

10:40

Platform

Not applicable

File name

X86_5222b4507281b943a7167b575a18aad3_31bf3856ad364e35_6.1.7601.21864_none_30e9e43ad4e53013.manifest

File version

Not applicable

File size

701

Date (UTC)

22-Nov-2011

Time (UTC)

10:40

Platform

Not applicable

File name

X86_f01952a15784d6714d6d393d105ede9d_31bf3856ad364e35_6.1.7600.21095_none_f1d62947364da61b.manifest

File version

Not applicable

File size

701

Date (UTC)

22-Nov-2011

Time (UTC)

10:40

Platform

Not applicable

File name

X86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21095_none_8b2ffa3e043f5727.manifest

File version

Not applicable

File size

4,035

Date (UTC)

22-Nov-2011

Time (UTC)

06:20

Platform

Not applicable

File name

X86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21864_none_8d35f082014e1fce.manifest

File version

Not applicable

File size

4,035

Date (UTC)

22-Nov-2011

Time (UTC)

06:15

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_14962e090f9a8d7e28921b2f8fe44b94_31bf3856ad364e35_6.1.7601.21864_none_5d2590bcae0f0bf3.manifest

File version

Not applicable

File size

705

Date (UTC)

22-Nov-2011

Time (UTC)

10:40

Platform

Not applicable

File name

Amd64_e2725dd8ab1c96561a2a7c58430107aa_31bf3856ad364e35_6.1.7600.21095_none_4e62ea0249cefbc7.manifest

File version

Not applicable

File size

705

Date (UTC)

22-Nov-2011

Time (UTC)

10:40

Platform

Not applicable

File name

Amd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21095_none_e74e95c1bc9cc85d.manifest

File version

Not applicable

File size

4,039

Date (UTC)

22-Nov-2011

Time (UTC)

07:29

Platform

Not applicable

File name

Amd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21864_none_e9548c05b9ab9104.manifest

File version

Not applicable

File size

4,039

Date (UTC)

22-Nov-2011

Time (UTC)

07:01

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

3,215

Date (UTC)

22-Nov-2011

Time (UTC)

10:40

Platform

Not applicable

Additional files for all supported IA-64–based versions of Windows Server 2008 R2

File name

Ia64_370ff54c722296cf48ac464a1124afce_31bf3856ad364e35_6.1.7601.21864_none_c1724381fc4e40b6.manifest

File version

Not applicable

File size

703

Date (UTC)

22-Nov-2011

Time (UTC)

10:39

Platform

Not applicable

File name

Ia64_9aed54fa9bec3f9ed4822fa626a09d6f_31bf3856ad364e35_6.1.7600.21095_none_338334099cbdf78a.manifest

File version

Not applicable

File size

703

Date (UTC)

22-Nov-2011

Time (UTC)

10:39

Platform

Not applicable

File name

Ia64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21095_none_8b319e34043d6023.manifest

File version

Not applicable

File size

4,037

Date (UTC)

22-Nov-2011

Time (UTC)

07:04

Platform

Not applicable

File name

Ia64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21864_none_8d379478014c28ca.manifest

File version

Not applicable

File size

4,037

Date (UTC)

22-Nov-2011

Time (UTC)

06:48

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,947

Date (UTC)

22-Nov-2011

Time (UTC)

10:39

Platform

Not applicable

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