Microsoft KB Archive/273400

= Ntbackup.exe Is Unable to Restore Data When it Encounters an Unknown Data String =

Article ID: 273400

Article Last Modified on 3/1/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition

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This article was previously published under Q273400



SYMPTOMS
When you attempt to restore data from a backup file (.bkf) by using the Ntbackup.exe tool, you may receive the following error message:

Unable to Restore



CAUSE
This problem can occur if Ntbackup.exe encounters an unknown data stream. The unknown data stream can be caused by a third-party .bkf file that contains data streams with Stream ID's that are not known by the Ntbackup.exe tool. Instead of skipping the invalid data stream and continuing with the restoration process, Ntbackup.exe becomes unable to perform the restoration and generates an error message.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

The English version of this fix should have the following file attributes or later:

  Date     Time     Version        Size       File name 9/6/00  12:19PM  5.0.2195.2122  1,100,000  Ntbackup.exe

NOTE: This hotfix makes Ntbackup.exe skip the unknown data stream so that it can continue to perform the restoration.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.



MORE INFORMATION
For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

Keywords: kbhotfixserver kbqfe kbbug kbenv kberrmsg kbfix kbwin2000presp2fix KB273400

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