title: robocopy, jungledisk file copy problems
body: <p>I'm a huge fan of robocopy and use it extensively to copy between various servers I need to update.</p>
  
  <p>Lately I've been archiving to an Amazon S3 account that I access via a mapped drive using JungleDisk.  I then robocopy my files from local PC to S3.</p>
  
  <p>Sometimes I get a very strange 'Incorrect function' error message in robocopy and the file fails to copy.  I've tried xcopy and straightforward copy and paste between file explorer windows.  In each case I get some variation of the 'Incorrect function' or 'Illegal MS-DOS function' and the file will never copy.</p>
  
  <p>I delete the target but to no avail.</p>
  
  <p>Any ideas?</p>