Reference number: CH000362

A device attached to the system is not functioning.

Issue:

A device attached to the system is not functioning.

Cause:

This issue can be caused by one of the below files being corrupt or missing:

1. Winoa386.mod
2. Vbrun300.dll

Solution:

Error when trying to start a MS-DOS session

1. Extract the file Winoa386.new from the Windows cabinets to the Windows\System directory. Depending upon which operating system you are using this file location may vary on the CD. Below is a listing of which cabinet holds this file based off of operating system:
   Windows 98 CD-ROM = Win98_45.cab
   Windows 95 / 95 OEM CD-ROM = Win95_03.cab
   Windows 95 DMF floppy diskettes = Win95_03.cab (Disk 3)
   Windows 95 Non DMF floppy diskettes = Win95_04.cab (Disk 4)
   
   Information about how to Extract files from the Windows cabinets can be found on document CH000363.
   
2. Boot to a bootable floppy diskette or boot the computer to a MS-DOS mode.
3. Once at the MS-DOS prompt, type:
   
   cd\windows\system
   ren winoa386.mod winoa386.ch
   ren winoa386.new winoa386.mod
   
4. Reboot the computer.

Error when trying to run a Visual Basic 3.0 program in Windows

If this issue is occurring when attempting to run a Visual Basic 3.0 program, delete vbrun300.dll from the Windows\System directory and recopy a new version of this file to the directory.

This file can be found on our Windows DLL section of our download page.