A. This is usually caused by a firewall at the user site blocking ftp connections. There are two types of ftp connections, so-called 'active' and 'passive'. The essential difference is that 'active' mode tries to open multiple connections to the ECMWF ftp server. This behaviour is undesirable for sites running firewalls and is usually blocked. Although passive mode ftp is usually the default, if you see this error try using the '-p' option 'ftp -p' or, if it's available the command 'pftp' which invokes a passive mode only ftp. |