msos2.hlp (Table of Contents; Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
SYS0020
SYS0020
 
Explanation
 
An unknown device was specified.
 
Action
 
Retry the command using a correct device name.