An operation was attempted on a nonblocking socket

Question

Connecting directly to ftp-server .....
Created passive data-socket: SocksConnector=
Created passive data-socket: Protocol=b, CompatibilityFlags=Standard, UseSSLClosure=True, WaitOnClose=True
---> RETR Down/1.1.d.full.log
Testing connection
---> PWD Used mem:51 MB
Connection test failed.
Closing... : System.IO.IOException: An I/O exception occurred.
System.IO.IOException: An I/O exception occurred. --->
System.Net.Sockets.SocketException:

Answer 1

Please post a log file to shed on the problem.

However always best to change directory into 'Down' before retrieving files. Some FTP servers can't cope with paths.

Answer 2

FTP server is IIS
This exception arises not always, only periodically with the same code
When to repeat again I post a log

Answer 3

Connecting to 89.190.255.99:21 Used mem:35 MB
2006-10-23 16:00:35,671 DEBUG - [rpl_FTPTransport] X.X.X.X resolved to X.X.X.X Used mem:35 MB
2006-10-23 16:00:35,671 DEBUG - [rpl_FTPTransport] Connecting directly to ftp-server X.X.X.X:21 Used mem:35 MB
2006-10-23 16:00:35,671 DEBUG - [rpl_FTPTransport] Created control-socket: SocksContext=, RemoteHost=X.X.X.X, controlPort=21, timeout=10000 Used mem:35 MB
2006-10-23 16:00:35,671 DEBUG - [rpl_FTPTransport] Stopping FTP task processor. Used mem:35 MB
2006-10-23 16:00:35,671 DEBUG - [rpl_FTPTransport] FTP task processor stopped. Used mem:35 MB
2006-10-23 16:00:35,687 DEBUG - [rpl_FTPTransport] ---> QUIT Used mem:31 MB
2006-10-23 16:00:35,687 ERROR - [rpl_FTPTransport] An I/O exception occurred. : System.IO.IOException: An I/O exception occurred. Used mem:31 MB
2006-10-23 16:00:35,687 ERROR - [rpl_FTPTransport] Used mem:31 MB
System.IO.IOException: An I/O exception occurred. ---> System.Net.Sockets.SocketException: