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out of date.
SYS0317
SYS0317Explanation
The message is not in the message file.
Action
Enter the correct message number or reinstall the message file, and retry
the command.