Hi,
Can you please check the below note.
Note 1238121 - SAP JVM for Software Logistics Tools
Check the section
Symptom:
You have done the following:
You first started SAPinst. Then you closed SAPinst GUI. SAPinst is still running. Then you started a separate SAPinst GUI that displays the following error:
Error while connecting to communication partner - see preceeding messages.
Could not connect to host <hostname> on port <port number>.
java.net.ConnectException: Connection refused: connect
Thanks
Rishi abrol