You customize a backup operation to back up some files on a computer that is running Windows Server 2008 R2 or Windows 7.
You select some files that you want to include in the backup operation. The path length of one selected file is longer than 260 characters.
In this scenario, the backup operation fails after the backup operation is started. Additionally, the following event is added to the Application log:
Log Name: Application Source: Microsoft-Windows-Backup Event ID: 547 Task Category: None Level: Warning Description: The backup operation that started at time has encountered errors for the volume(s) volume. Log of files not successfully backed up.
This issue occurs because the Windows Block Level Backup Engine service (Wbengine.exe) handles file paths that are longer than 260 characters incorrectly.
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:
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.
To apply this hotfix, you must be running Windows 7 or Windows Server 2008 R2. Additionally, you must have the Windows Server Backup feature installedon the computer that is running Windows Server 2008 R2.
To use the hotfix in this package, you do not have to make any changes to the registry.
You must restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace a previously released hotfix.
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 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 maintaining the state of the updated component. 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
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
For all supported IA-64-based versions of Windows Server 2008 R2
To work around this issue, move the file to a location that reduces the path length of the file to less than 260 characters, and then back up the file.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
When this issue occurs, you find the following entry in the Windows backup log:
Error in backup of volume name during read: Error [0x80070057] The parameter is incorrect. Error in backup of volume path during read: Error [0x8007007b] The filename, directory name, or volume label syntax is incorrect.
For more information about Backup Schedule Wizard that is started from the Windows Server Backup Microsoft Management Console (MMC) snap-in, view the following Microsoft Tech website: