EZTape Hangs or Generates Error with Compressed Drive (97848)
The information in this article applies to:
• Microsoft MS-DOS operating system 6.0
• Microsoft MS-DOS operating system 6.2
• Microsoft MS-DOS operating system 6.22
This article was previously published under Q97848
This information applies to both Microsoft DoubleSpace and Microsoft
DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands
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.
• 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
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
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:
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
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.
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