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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

SYS1966
 
This error usually occurs when:
 
1. The filename or syntax has unacceptable characters. Unacceptable
   characters are: . " /  [ ] : | < > + ; , and all control characters.
 
2. The filename may have been typed incorrectly.
 
Action
 
Correct the syntax and spelling. Retry the command.