I built the bacnet-sc. I ran the bacschub.exe on the host (192.168.1.101). And when I run the bacwi.exe on the virtual machine (192.168.1.109), I can find the hub well. But the bacwi program stops as follows.

Connected to a BACnet/SC hub!
bsc_send_pdu() <<< ret = 8
bsc_node_event() >>> ev = 4
bsc_node_event() <<<
bsc_receive() processing data...
bsc_receive() pdu_len = 21
;Device MAC (hex) SNET SADR (hex) APDU
;-------- -------------------- ----- -------------------- ----
99 F2:6C:E3:7A:66:2A 0 00 480
;
; Total Devices: 1
bsc_cleanup() >>>

Can I get the hub and client(who-is) to shut down the websockets normally? For your information, both the hub and client ran on win10.