Microsoft KB Archive/97848

= EZTape Hangs or Generates Error with Compressed Drive =

Article ID: 97848

Article Last Modified on 11/23/1999

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APPLIES TO


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

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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 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

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: KB97848

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