Bad command or file name
Cause: COMMANDS. The command you entered is not a valid DOS command.
o Check the spelling of the command and re-enter it.
o If you spelled the command name correctly, make sure that the default drive contains the external command
or batch file you are trying to process.
Bad command or parameters
Cause: IBMBIO. As DOS read and interpreted the commands within the CONFIG.SYS file, it identified a bad
command or parameter.
Action: Edit the CONFIG.SYS file and correct the statement where the error occurred.
Bad diskette in drive
o The wrong diskette or tape may have been inserted (For example, a 1.2MB diskette was expected, but a
360KB was inserted)
o Also, if you are using a drive other than A or B to back up to, and the diskette is not formatted, this error
o Check your backup speed. If the inserted diskette was used in a high- or medium-speed backup, and the
current setting is low speed, this error might occur.
o Insert the correct diskette or tape.
o Backup requires preformatted media when you are using the Fixed or Removable drive and path options, or
if you are backing up to diskettes in drives other than A or B.
o In the third instance, select the Format button in the Disk Insert dialog box.
Bad drive-request structure length
Cause: QCONFIG. Hardware error has occurred.
Action: Re-boot your system and try the command again. If the problem persists, contact your service
Bad or missing d:\path\devicedriver
Cause: COMMANDS. The device driver file is not on the drive or the directory listed in the command-line
Action: Edit your CONFIG.SYS file and type the correct drive and path name in the device driver line.
Bad or missing Command Interpreter
Cause: DOS. This message suggests one of the following:
o The disk or diskette that you are using to start PC DOS does not contain a copy of COMMAND.COM, or an
error occurred while PC DOS was loading the diskette.
o COMMAND.COM has been removed from the directory it was in originally when you started PC DOS.
o The COMSPEC= parameter in the environment points to a directory not containing COMMAND.COM, and PC DOS
is trying to reload the command processor.
Action: Restart PC DOS (press and hold Ctrl+Alt; then press Del). If the system reset fails to solve the problem,
start PC DOS with the Setup Diskette from the PC DOS installation diskettes, and copy COMMAND.COM from the
backup diskette to the root directory of the disk that failed.
Bad or missing Keyboard Definition File
Cause: KEYB. The KEYBOARD.SYS file could not be found, contained invalid data, or is in the wrong
Action: Make sure that the specified KEYBOARD.SYS file exists and is in the appropriate subdirectory. If the file
exists, get a new KEYBOARD.SYS file from the Setup diskette in the PC DOS installation diskettes.
Bad Partition Table
Cause: FORMAT. The partition table of the hard disk does not have a DOS partition or the partition table is
Action: Load FDISK, set up a new DOS partition on the hard disk, and retry the FORMAT command.
Batch file missing
Cause: DOS. DOS cannot find the batch file it was processing. The file might have been erased or renamed by
one of the steps within it or the current drive might have been changed within the batch file, and the batch
processor can no longer find the .BAT file used by your PATH. Batch processing stops and the command prompt
o If the file name was changed, correct the command that changed the name.
o If the file was erased, use your backup copy. If you used the E Editor to create the file or make changes to
it, rename the .BAK file to .BAT. Correct the command that deleted the file.
o Include the drive letters in the PATH.
Baud rate required
Cause: MODE. You tried to start a COM port without entering a baud rate. For example:
MODE COM1 PARITY=n DATA=8
Action: Re-enter the appropriate format specifying a baud rate.
Block mark required
Cause: E. You tried to create a box around a segment of text without marking it first.
Action: You must block mark the segment of text before you can create a box around it.
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