KMtronic UDP

[fuzero]

I've installed 2 KMtronic UDP 8 relay and set the hardware as 'KMTronic Gateway with LAN/UDP interface' .
- Domoticz ver.3.8153 - Hardware Olinuxino A20 micro
It works and i can switch all relays but after some times (1 or 2 hours ) i have error message :
" kmtronic-maga hardware (3) thread seems to have ended unexpectedly "
every minute.

Hardware is working without problem, if i send command from shell like:
$ echo FF0000 | socat - udp-datagram:192.168.50.190:12345
00001100

and testing latency in answer :
# ping -s 1024 192.168.50.190
PING 192.168.50.190 (192.168.50.190) 1024(1052) bytes of data.
1032 bytes from 192.168.50.190: icmp_seq=1 ttl=100 time=10.2 ms
1032 bytes from 192.168.50.190: icmp_seq=2 ttl=100 time=10.4 ms
1032 bytes from 192.168.50.190: icmp_seq=3 ttl=100 time=9.47 ms
1032 bytes from 192.168.50.190: icmp_seq=4 ttl=100 time=9.95 ms
--- 192.168.50.190 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 9.473/10.028/10.429/0.362 ms

but error message is :
2017-10-20 07:10:01.030 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly
2017-10-20 07:10:01.411 Error: Switch command not send!, Hardware device disabled or not found!
2017-10-20 07:10:01.411 Error: Error sending switch command, DevID: 3, Time: 2017-10-20 07:10:01
2017-10-20 07:10:30.038 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly
2017-10-20 07:11:00.047 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly
2017-10-20 07:11:30.061 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly
2017-10-20 07:12:00.068 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly
2017-10-20 07:12:30.078 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly
2017-10-20 07:13:00.092 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly
2017-10-20 07:13:30.106 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly
2017-10-20 07:14:00.115 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly
2017-10-20 07:14:30.124 Error: kmtronic-maga hardware (3) thread seems to have ended unexpectedly

My compliments for this great project.