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Q74454: MS-DOS Shell and the Colorado Tape Backup System

Article: Q74454
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:5.x,6.0
Operating System(s): 
Keyword(s): 
Last Modified: 17-DEC-2000

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The information in this article applies to:

- Microsoft MS-DOS operating system versions 5.0, 5.0a, 6.0 
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SYMPTOMS
========

You have a Colorado Tape Backup on your system, and when you try to exit a
program that has been run from MS-DOS Shell, you receive an error message
similar to one of the following:

  Unable to Load MS-DOS Shell

  -or-

  Unable to Unload MS-DOS Shell

If you choose the RETRY button you are returned to MS-DOS Shell. If you choose
the NO button, you are returned to the MS-DOS command prompt.

CAUSE
=====

According to Colorado Memory Systems, when you load the automatic backup program
from the AUTOEXEC.BAT file, it causes a memory conflict with Shell. If its
automatic tape backup program is loaded from the AUTOEXEC.BAT file, it does not
leave enough memory for Shell to operate properly.

WORKAROUND
==========

A workaround for this problem is to load the automatic tape backup program from
the MS-DOS command prompt, instead of the AUTOEXEC.BAT file.

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

The product included here is manufactured by a vendor independent of Microsoft;
we make no warranty, implied or otherwise, regarding this products' performance
or reliability.

Additional query words: 5.00 6.00

======================================================================
Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS600 kbMSDOS500 kbMSDOS500a
Version           : MS-DOS:5.x,6.0

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

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