Failed to establish initial TCP/IP connection (Chilkat-Python) - python-3.5

Question

I'm trying to send a file from raspberry pi to my Windows pc using python-chilkat module. However it is returning this kind of error:
ChilkatLog: Connect_Ssh: DllDate: Dec 21 2018 ChilkatVersion: 9.5.0.76
UnlockPrefix: 30-day trial Architecture: Little Endian; 32-bit
Language: armhf linux Python 3.* VerboseLogging: 0 connectInner:
hostname: 192.168.1.4 port: 22 sshConnect:
connectSocket:
connect_ipv6_or_ipv4:
getsockopt indicates an error.
socketErrno: 111
socketError: Connection refused
--connect_ipv6_or_ipv4
connect_ipv6_or_ipv4:
getsockopt indicates an error.
socketErrno: 111
socketError: Connection refused
--connect_ipv6_or_ipv4
connect_ipv6_or_ipv4:
getsockopt indicates an error.
socketErrno: 111
socketError: Connection refused
--connect_ipv6_or_ipv4
connect_ipv6_or_ipv4:
getsockopt indicates an error.
socketErrno: 111
socketError: Connection refused
--connect_ipv6_or_ipv4
--connectSocket
Failed to establish initial TCP/IP connection
hostname: 192.168.1.4
port: 22 --sshConnect
--connectInner Failed.
--Connect_Ssh
--ChilkatLog
Can someone explain to me why Im getting these error?

Answer 1

See this online example which experiments with different failure cases to see what errors are returned: https://www.example-code.com/chilkat2-python/socket_connect_fail.asp
In some of the test cases, you'll see "connection rejected" which is the same as "connection refused". In other cases you'll get a timeout. The cases that result in "connection rejected" are the most likely causes for the failure.
PS> I understand that the example I'm pointing to is for a simple TCP socket connection, but SSH begins with a simple TCP connection, and that is what is failing.