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out of date.
SYS0005
SYS0005Explanation
Either the file is marked read-only or the file is being used by another
process.
Action
Check that the file and command are compatible. Then retry the command.