Backing up virtual machines fails when using the CSV writer after installation of update 2919355 in Windows

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 EssentialsWindows Server 2012 R2 for Embedded Systems More

This article describes an issue when you back up some virtual machines in Windows 8.1 or Windows Server 2012 R2. Check out the prerequisite before you install this update or hotfix.

Symptoms


Assume that you install update 2919355 on a Windows 8.1-based or Windows Server 2012 R2-based computer. When you try to back up some Hyper-V virtual machines that reside on cluster shared volumes, you receive an error message that indicates the backup request has failed.
Here is a sample of the error messages that you may encounter when this issue occurs:
Error(s): vss_e_unexpected_provider_error

Csv writer is in failed state with unexpected error

Note The error message that an end-user will see is surfaced by the backup vendor products, and therefore it will vary by vendor.

Resolution


To resolve this issue, install the update or hotfix that is described in this article.

Update information

How to obtain this update

Method 1: Windows Update
This update is available from Windows Update.
Method 2: Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
Operating systemUpdate
All supported x64-based versions of Windows 8.1Download Download the package now.
All supported x64-based versions of Windows Server 2012 R2Download Download the package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.


Method 3: Update Rollup Package
The following update rollup is available:
2995388 October 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2

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, go to the following Microsoft website: 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 update or hotfix, you must be running Windows 8.1 and Windows Server 2012 R2, and have the update 2919355 installed.

For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:
2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014


Registry information

To apply this update or hotfix, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update or hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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