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Q97848: EZTape Hangs or Generates Error with Compressed Drive

Article: Q97848
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:6.0,6.2,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 23-NOV-1999

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

- Microsoft MS-DOS operating system versions 6.0, 6.2, 6.22 
-------------------------------------------------------------------------------

This information applies to both Microsoft DoubleSpace and Microsoft
DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands
and filenames.

SYMPTOMS
========

When you run Irwin Magnetic Systems' EZTape for MS-DOS, version 2.22 or version
3.1, on a DoubleSpace-compressed drive, the following problems may occur:

- EZTape may stop responding (hang) when performing a backup or restore on the
  DoubleSpace-compressed drive.

-or-

- EZTape may display one of the following error messages when performing a
  backup or restore on a compressed drive:

   - Run-time error R6001 null pointer assignment

   - EMM386 exception error #12, enter to reboot computer

CAUSE
=====

EZTape for MS-DOS version 2.22 or 3.1 may identify a DoubleSpace- compressed
drive as a nonstandard drive and may require that the DOSONLY environment
variable is set before you can begin an action ona compressed drive.

WORKAROUND
==========

To work around this problem, set the MS-DOS environment variable to DOSONLY=1
before you use EZTape for MS-DOS.

To do this, using MS-DOS Editor (or another ASCII text editor), insert the
following statement in the AUTOEXEC.BAT file:

  " SET DOSONLY=1 " (without the quotation marks)

Setting the DOSONLY environment variable forces EZTape for MS-DOS to use standard
MS-DOS system calls to access the drive. You must reboot your computer for this
change to take effect.

NOTE: The DOSONLY environment variable should not be necessary for use on
uncompressed drives.


For more information, contact Irwin Magnetic Systems Technical Support.

EZTape for MS-DOS is manufactured by Irwin Magnetic Systems, Inc., a vendor
independent of Microsoft; we make no warranty, implied or otherwise, regarding
this product's performance or reliability.

Additional query words: 6.00 double space back up 3rdparty 6.20 dblspace easy tape errmsg err msg

======================================================================
Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS622 kbMSDOS620 kbMSDOS600
Version           : MS-DOS:6.0,6.2,6.22

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