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out of date.
SYS1701
SYS1701Explanation
The /S option cannot be used when copying to a subdirectory belonging to a
source directory.
Action
Delete the /S option or copy the files to a directory outside of the source
directory.