KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q108165: PRB: Cannot Read from Drive <Drive Letter>

Article: Q108165
Product(s): Microsoft FoxPro
Version(s): 2.50 2.50a 2.50b 3.00 5.00 | 2.5
Operating System(s): 
Keyword(s): kberrmsg
Last Modified: 03-AUG-2000

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Visual FoxPro for Windows, versions 3.0, 5.0, 6.0 
- Microsoft FoxPro for Windows, versions 2.5, 2.5a, 2.5b 
- Microsoft FoxPro for MS-DOS, versions 2.5, 2.5a, 2.5b 
-------------------------------------------------------------------------------

SYMPTOMS
========

Mainframe workstation software that maps drives D and E to hold them for future
use when using emulation will cause the following error message to appear when a
disk drive cannot be read:

  Cannot read from drive <drive letter>.

Use of the MS-DOS Interlnk program and the INTERSVR command is also a source of
this message. Interlnk's drive mapping redirects the client system's drives to
the next available drive letters of the server. If INTERLNK.EXE is loaded in the
CONFIG.SYS file of the client and the server PC is then disconnected, FoxPro
will be told that sequential drive mapping exists, when, in fact, there will be
no response when FoxPro checks the drives in sequence that were on the connected
PC.

CAUSE
=====

Some FoxPro operations appear to scan all consecutive disk drives.

The following operations have been reported to cause this error on computers with
a drive that cannot be read:

- Running an executable file (.EXE) created by the FoxPro Distribution Kit.

- Opening a project whose home directory points to a drive that cannot be read.

- Setting a printer driver in FoxPro for MS-DOS.

WORKAROUND
==========

Reassign the drive letter of the device that cannot be read so that it is not in
consecutive order with the other drives.

For example, if drive C is a hard disk drive, and drive D is a CD-ROM drive that
causes the error message when it does not contain a disc, reassign the CD-ROM
drive letter to drive Z.

You may need to either consult the manual for your CD-ROM drive or use the MS-DOS
SUBST command.


NOTE: Reassigning the drive letter may require the use of the LASTDRIVE=<drive
letter> command in the CONFIG.SYS file.

MORE INFORMATION
================

The following hardware configurations may cause a disk drive to report that it
cannot be read:

- A laptop computer does not have a floppy drive A or B.

- A CD-ROM drive does not contain a disc.

- A removable hard disk drive does not contain a hard disk.

Additional query words: VFoxWin FoxDos FoxWin errmsg err msg can't notebook floppies bernoulli box IBM PS/2 80 akz

======================================================================
Keywords          : kberrmsg 
Technology        : kbVFPsearch kbAudDeveloper kbFoxproSearch kbZNotKeyword3 kbFoxPro250DOS kbFoxPro250aDOS kbFoxPro250bDOS kbFoxPro250 kbFoxPro250a kbFoxPro250b kbVFP300 kbVFP500 kbVFP600
Version           : 2.50 2.50a 2.50b 3.00 5.00 | 2.5

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.