500 500: FTP: Error initializing Winsock 501 501: FTP: FTP session already open 502 502: FTP: FTP session is not open 503 503: FTP: Invalid session handle 504 504: FTP: Invalid transfer type 505 505: FTP: Invalid request number 506 506: FTP: Invalid value 507 507: FTP: File name not specified 508 508: FTP: Host not specified 509 509: FTP: Local file not found 801 801: WSock: User cancelled. 802 802: WSock: Bad parameter specified. 803 803: WSock: Error initializing Winsock. 804 804: WSock: Invalid socket. 805 805: WSock: Error creating socket. 806 806: WSock: Bad or unknown IP address specified. 807 807: WSock: Bad or unknown host name specified. 808 808: WSock: Unknown service or bad port # specified. 809 809: WSock: Item not found. 810 810: WSock: Must retry Winsock call. 811 811: WSock: Disconnected from host. 812 812: WSock: Host busy. 1000 WSock WIL Extender