Java portal to bw hana JCO error / Connection failed. Make sure that Single Sign-On is configured correctly

Error> occured  >Sun Mar 29 11:11:28,123<   
RfcException:
    message: Connect to message server host failed
Connect_PM  TYPE=B MSHOST=xxxxxxx.LOCAL GROUP=PUBLIC R3NAME=XX MSSERV=sapmsXXX  PCS=1
ERROR       partner xxxxxxxxxx:sapmsXXX' not reached
TIME        Sun Mar 29 11:11:28 2015
RELEASE     721
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3285
DETAIL      NiPConnect2: 192.168.00.00:3600
SYSTEM CALL connect
ERRNO       10061
ERRNO TEXT  WSAECONNREFUSED: Connection refused
COUNTER     1
    Return code: RFC_FAILURE(1)
    error group: 102
    key: RFC_ERROR_COMMUNICATION
==============================

Solution:
 
The error saying that 3600 port is not communicating:192.168.00.00:3600(port name sapmsXXX) 
We have two solution apply here

• 1-first go to the host and telnet the port whether its working or not. If not working try to open that port.

 

• 2- If you cannot able to open the port, go  service file and search the sapmsXXX you can see the port 3600 just change the port number 3609 or some other which is working.( on same 36xx series)

And do the telnet with server name  3609 it will work with sapmsXXX. so careful about duplication of port. using the same service.
 
This solution I did on JCO connection issues, not to other network issue.

After changing the PORT it works fine for me.

Thanks
Yoonus