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Microsoft KB Archive/104546

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Knowledge Base

MakeSys Fails to Find DBLSPACE.BIN If APPEND Is Loaded

Article ID: 104546

Article Last Modified on 8/9/2007


  • Microsoft MS-DOS 6.2 Standard Edition

This article was previously published under Q104546


MS-DOS 6.2 MakeSys (included with the downloadable version of MS-DOS 6.2 Step-Up and run by SETUP.BAT) cannot find the MS-DOS 6.0 DBLSPACE.BIN file if APPEND is active.

This problem occurs when you have APPEND C:\DOS in your AUTOEXEC.BAT file.


To work around this problem, remove the APPEND command from your AUTOEXEC.BAT file and restart your computer before running MakeSys.

WARNING: If you run MakeSys from the root directory (instead of running SETUP.BAT), your original system files (IO.SYS, MSDOS.SYS, and DBLSPACE.BIN) are overwritten. MakeSys places the updated system files in the directory from which it is run. Running SETUP.BAT automatically creates a STEPUP directory and run MakeSys from there, avoiding this situation.


More information on this topic may be available from Microsoft Information Services. Microsoft Information Services are available on the World Wide Web by connecting to The FTP site is located at

Additional query words: 6.20

Keywords: KB104546