@Amigakit, I have seen and followed that post already, still no luck. I get the message "device Cat: already mounted", but no disk icon appears on the workbench and there is no floppy activity at all. The Cat: drive does not show up as a valid device in a shell, or in DOpus, even though when I double click on the newly created Cat DOS device, again I get the error message "device Cat: already mounted". I don't get where I am going wrong? :-?