Microsoft KB Archive/91664

= MS-DOS Backup Err Msg: Unable to Open Component File =

Article ID: 91664

Article Last Modified on 11/26/1999

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APPLIES TO


 * Microsoft MS-DOS 6.0 Standard Edition
 * Microsoft MS-DOS 6.2 Standard Edition
 * Microsoft MS-DOS 6.21 Standard Edition
 * Microsoft MS-DOS 6.22 Standard Edition

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This article was previously published under Q91664



SYMPTOMS
If you back up to a network drive, and someone moves your files, you cannot restore them until they are moved back. When you try to restore your files, you receive the following error message:

Unable to open component file





CAUSE
If you back up to a fixed (not floppy) drive, Microsoft Backup creates a .001 file in a .FUL directory. For example, if you back up to F:\TEMP on your fixed drive or a network drive, Backup creates

f:\TEMP\DEFAULT\xxxxxxxx.FUL\xxxxxxxx.001

where xxxxxxxx are numbers and letters generated from the date. Moving the .001 file causes the restore option in Backup to fail and generates the error message.



WORKAROUND
To work around this problem, re-create your original directory structure and move the .001 file back to its original location. If you cannot remember the original directory structure, attempt to restore your files again. The error message displayed by Backup tells you the directory and filename for which it is looking.

How the Backup Filename in Generated
The backup file for DEFAULT\CCYMMDDA.FUL is calculated as follows:

default = name of backup set

y = last number of year

mm = month of backup

dd = day of backup

a = A - Z, depending on the number backups that day

Additional query words: 6.22 6.0 msbackup 6.20

Keywords: KB91664

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