You, as a user of IND$FILE, do not, repeat, do not, enter the command yourself. Rather, whatever file transfer mechanism your terminal emulator uses, enters the command on your behalf when it is ready to do a file transfer.. You should only do a file transfer when you have a TSO READY prompt (or VM/370 CMS READY; prompt) on your screen. I have occasionally had a successful transfer from ISPF option 6, but that was before the new style ISPF screens that sort of look like Windoze windows. Your terminal emulator will construct a valid IND$FILE command for you. Be sure you tell the terminal emulator whether you are using TSO or the CMS piece of VM/370; the command syntax is slightly different.