Further to the above:
The following is relevant output from netstat -aon command, shortly after startup of VARA & VARAC processes.
TCP 127.0.0.1:8100 127.0.0.1:50200 FIN_WAIT_2 9960
TCP 127.0.0.1:8300 127.0.0.1:50199 ESTABLISHED 9960
TCP 127.0.0.1:8301 127.0.0.1:50201 ESTABLISHED 9960
TCP 127.0.0.1:8884 0.0.0.0:0 LISTENING 4
TCP 127.0.0.1:9012 0.0.0.0:0 LISTENING 7116
TCP 127.0.0.1:49704 0.0.0.0:0 LISTENING 2668
TCP 127.0.0.1:50163 0.0.0.0:0 LISTENING 4136
TCP 127.0.0.1:50199 127.0.0.1:8300 ESTABLISHED 1584
TCP 127.0.0.1:50200 127.0.0.1:8100 CLOSE_WAIT 1584
TCP 127.0.0.1:50201 127.0.0.1:8301 ESTABLISHED 1584
It appears that the KISS port network connection is opened on startup of VARA & VARAC, but are not held open.
On the next running of netstat -aon (5mins), the connection and port info has disappeared. Is this the reason for the log output "Error: Unable to send KISS message to VARA modem. Disconnecitng modem." ?