S DBDEMO.DOSave demo batch file, or get AE Err K DBDEMO.DOKS sequence: Kill demo from disk first, S DBDEMO.DOthen Save it. It's saved for sure now! L DBDEMO.DOShould get AE Err (memory) S DBDEMO.DOShould get AE Err (disk) L ZYXWVU.CONo such file: Should get FF Err N No such command: Should get NM Err