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Q101559: Microsoft Backup Err Msg: Alert! Unknown Compression of File

Article: Q101559
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:6.0,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 19-NOV-1999

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The information in this article applies to:

- Microsoft MS-DOS operating system versions 6.0, 6.22 
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SYMPTOMS
========

When you try to restore backups with Microsoft Backup for MS-DOS or Microsoft
Backup for Windows, you receive the following error message:

  Alert! Unknown compression of file

CAUSE
=====

This error occurs when:

- The backups were made with a beta version of Microsoft Backup.

-or-

- You used MS-DOS 6.22 to create a compressed backup and then attempted to
  restore it using Microsoft Backup for MS-DOS 6.0.

WORKAROUND
==========

If you made backups with a beta version of Microsoft Backup, there is no
workaround for this situation. You must create new backups with the final
release version of MS-DOS 6.0 or later.

If you made backups under MS-DOS 6.22 Backup with compression turned on, either
restore the data with MS-DOS 6.22 version of Backup, or back up the data with
compression turned off.

Additional query words: 6.00 back up msbackup mwbackup

======================================================================
Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS622 kbMSDOS600
Version           : MS-DOS:6.0,6.22

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