The server received a command that was not protected at protection level private. The server is configured to only accept commands protected at protection level private.
The command fails. FTP continues.
Reissue the command using protection level private. If the client cannot send a protection level private command, the system programmer must change the FTP server before the client can log in.
If the client cannot send a protection level private command, consider changing the SECURE_CTRLCONN value in the server FTP.DATA file to allow other levels of protection.