Article ID: 74496
Article Last Modified on 5/12/2003
APPLIES TO
- Microsoft MS-DOS 2.11 Standard Edition
- Microsoft MS-DOS 3.1
- Microsoft MS-DOS 3.2 Standard Edition
- Microsoft MS-DOS 3.21 Standard Edition
- Microsoft MS-DOS 3.3 Standard Edition
- Microsoft MS-DOS 3.3a
- Microsoft MS-DOS 4.0 Standard Edition
- Microsoft MS-DOS 4.01 Standard Edition
- Microsoft MS-DOS 5.0 Standard Edition
- Microsoft MS-DOS 5.0a
- Microsoft MS-DOS 6.0 Standard Edition
- Microsoft MS-DOS 6.2 Standard Edition
- Microsoft MS-DOS 6.21 Standard Edition
- Microsoft MS-DOS 6.22 Standard Edition
This article was previously published under Q74496
SUMMARY
Microsoft MS-DOS reserves certain names for system device drivers. If you try to name a file using one of these names, you will receive the following error message:
The solution is to change the file name.
MORE INFORMATION
Below is a list of default device driver names.
Name Function ---- -------- CON Keyboard and display PRN System list device, usually a parallel port AUX Auxiliary device, usually a serial port CLOCK$ System real-time clock NUL Bit-bucket device A:-Z: Drive letters COM1 First serial communications port LPT1 First parallel printer port LPT2 Second parallel printer port LPT3 Third parallel printer port COM2 Second serial communications port COM3 Third serial communications port COM4 Fourth serial communications port
To identify system device driver names, use one of the following two commands:
- mem /d | more
- debug d 0070:0000
Additional query words: 6.22 2.x 3.x 4.x 5.00 5.00a 6.00 6.20
Keywords: KB74496