Command line return nothing but host

WinSCP.com /ini=nul /command open -hostkey=acceptnew -password=password sftp://username@ipaddress get /home/username/Windows_resource/md5.txt exit

Executing above command returns searching for host, refer below
Opening session using command-line parameter in scripting is deprecated. Use 'open' command instead.
Searching for host...
Connecting to host...
Authenticating...
Using username "username".
Authenticating with pre-entered password.
Authenticated.
Starting the session...
Session started.
Active session: [1] username@ipaddress
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:
Host:

WinSCP.com /ini=nul /command 'open -hostkey=acceptnew -password=password sftp://username@ipaddress' 'get /home/username/Windows_resource/md5.txt' 'exit'