MakeSys Hangs or Creates Invalid Files, Causing System Hang (104987)
The information in this article applies to:
• Microsoft MS-DOS operating system 6.2
• Microsoft MS-DOS operating system 6.22
This article was previously published under Q104987
This information applies to both Microsoft DoubleSpace and Microsoft
DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands
If Microsoft MS-DOS MakeSys (included in the downloadable version of MS-DOS
6.2 and 6.22 Step-Up) does not find a valid signature (FXPF) at the
beginning of the patch file, it displays the following error message
where <filename> is IO.SYS, MSDOS.SYS, or DBLSPACE.BIN.
This error occurs when MakeSys is unable to create the new MS-DOS system
• One of the binary patch files (DBLSPACE.BI#, MSDOS.SY#, or IO.SY#) is
NOTE: If the patch file is severely corrupted, MakeSys may stop
• There are too many files in the root directory.
• One of the source files (DBLSPACE.BIN, MSDOS.SYS, or IO.SYS) does not
match the file included with the MS-DOS 6.0 or 6.2 Upgrade.
If the patch files are corrupted, download the MS-DOS 6.2 Step-Up from the
bulletin board again and re-run MakeSys using the new files.
If there are too many files in the root directory, move some of them to a
subdirectory so that you do not have more than 500 files, including hidden
and system files, in the root directory.
NOTE: To obtain a directory listing of all files in the root of drive C,
including hidden and system files, type the following at the MS-DOS command
prompt and then press ENTER:
If your source files do not match the files included with the MS-DOS 6.0 or
6.2 Upgrade, see the README.NOW file for instructions on replacing your
MS-DOS 6.0 or 6.2 system files.
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