Best to post the log file snippet that shows the problem.
You could try changing to passive mode, or using setActiveIPAddress() to force a valid IP address (the client's) to be supplied to the server.
Thank you, I will try to get the log file. The problem is that it happen at a remote location and I don't have access to the station there. The user just sent a capture of the pop message for the exception. Will try to get more information on it.
FYI, it is already using passive transfer mode. Also, I realized that I posted in the wrong forum. Please move the post to the edtFTP instead of the edtFTPj. Thank you very much.
ftpclient = New Ftp.FTPClient
ftpclient.RemoteHost = tsite
ftpclient.ControlPort = tport
ftpclient.Timeout = 9600000
ftpclient.ConnectMode = Ftp.FTPConnectMode.PASV