Dear All
I'm running flent in a Mint VM under Hyper-V in Windows 10. I am using netperf.bufferbloat.net as the destination host.
I am getting "no valid data" with rrul.
From the log, I can see that the lrtt connection check fails, but I am not knowledgeable enough to tell if anything else if failing.
I would be very grateful for help.
Below is the debug log. Thanks so much for your suggestions.

17:43:24 DEBUG: Executing test environment file /usr/share/flent/flent/tests/rrul.conf
17:43:24 DEBUG: Looking up hostname 'netperf.bufferbloat.net'.
17:43:24 DEBUG: Executing test environment file /usr/share/flent/flent/tests/rrul.conf
17:43:24 DEBUG: Gathering local metadata
17:43:24 DEBUG: Looking up hostname 'netperf.bufferbloat.net'.
17:43:24 INFO: Starting rrul test. Expected run time: 70 seconds.
17:43:24 DEBUG: which: /home/jmarks/.local/bin/netperf is not an executable file
17:43:24 DEBUG: which: /usr/local/sbin/netperf is not an executable file
17:43:24 DEBUG: which: Found netperf executable at /usr/local/bin/netperf
17:43:24 DEBUG: Ping (ms) UDP EF: Adding child IrttRunner
17:43:24 DEBUG: which: /home/jmarks/.local/bin/irtt is not an executable file
17:43:24 DEBUG: which: /usr/local/sbin/irtt is not an executable file
17:43:24 DEBUG: which: /usr/local/bin/irtt is not an executable file
17:43:24 DEBUG: which: /usr/sbin/irtt is not an executable file
17:43:24 DEBUG: which: Found irtt executable at /usr/bin/irtt
17:43:24 DEBUG: UDP RTT test: Cannot use irtt runner (Irtt connection check failed: Error: read udp4 192.168.2.130:32794->23.226.232.80:2112: read: connection refused
). Using netperf UDP_RR
17:43:24 DEBUG: Ping (ms) UDP EF: Adding child NetperfDemoRunner
17:43:24 DEBUG: Ping (ms) UDP BK: Adding child IrttRunner
17:43:24 DEBUG: which: /home/jmarks/.local/bin/irtt is not an executable file
17:43:24 DEBUG: which: /usr/local/sbin/irtt is not an executable file
17:43:24 DEBUG: which: /usr/local/bin/irtt is not an executable file
17:43:24 DEBUG: which: /usr/sbin/irtt is not an executable file
17:43:24 DEBUG: which: Found irtt executable at /usr/bin/irtt
17:43:24 DEBUG: UDP RTT test: Cannot use irtt runner (Irtt connection check failed: Error: read udp4 192.168.2.130:49034->23.226.232.80:2112: read: connection refused
). Using netperf UDP_RR
17:43:24 DEBUG: Ping (ms) UDP BK: Adding child NetperfDemoRunner
17:43:24 DEBUG: Ping (ms) UDP BE: Adding child IrttRunner
17:43:24 DEBUG: which: /home/jmarks/.local/bin/irtt is not an executable file
17:43:24 DEBUG: which: /usr/local/sbin/irtt is not an executable file
17:43:24 DEBUG: which: /usr/local/bin/irtt is not an executable file
17:43:24 DEBUG: which: /usr/sbin/irtt is not an executable file
17:43:24 DEBUG: which: Found irtt executable at /usr/bin/irtt
17:43:24 DEBUG: UDP RTT test: Cannot use irtt runner (Irtt connection check failed: Error: read udp4 192.168.2.130:41419->23.226.232.80:2112: read: connection refused
). Using netperf UDP_RR
17:43:24 DEBUG: Ping (ms) UDP BE: Adding child NetperfDemoRunner
17:43:24 DEBUG: which: /home/jmarks/.local/bin/fping is not an executable file
17:43:24 DEBUG: which: /usr/local/sbin/fping is not an executable file
17:43:24 DEBUG: which: /usr/local/bin/fping is not an executable file
17:43:24 DEBUG: which: /usr/sbin/fping is not an executable file
17:43:24 DEBUG: which: Found fping executable at /usr/bin/fping
17:43:24 DEBUG: which: /home/jmarks/.local/bin/ping is not an executable file
17:43:24 DEBUG: which: /usr/local/sbin/ping is not an executable file
17:43:24 DEBUG: which: /usr/local/bin/ping is not an executable file
17:43:24 DEBUG: which: /usr/sbin/ping is not an executable file
17:43:24 DEBUG: which: /usr/bin/ping is not an executable file
17:43:24 DEBUG: which: /sbin/ping is not an executable file
17:43:24 DEBUG: which: Found ping executable at /bin/ping
17:43:24 DEBUG: Forked /usr/local/bin/netperf as pid 5289
17:43:24 DEBUG: Started NetperfDemoRunner idx 0 ('TCP upload BE')
17:43:24 DEBUG: Forked /usr/local/bin/netperf as pid 5291
17:43:24 DEBUG: Started NetperfDemoRunner idx 1 ('TCP upload BK')
17:43:24 DEBUG: Forked /usr/local/bin/netperf as pid 5293
17:43:24 DEBUG: Started NetperfDemoRunner idx 2 ('TCP upload CS5')
17:43:24 DEBUG: Forked /usr/local/bin/netperf as pid 5295
17:43:24 DEBUG: Started NetperfDemoRunner idx 3 ('TCP upload EF')
17:43:24 DEBUG: Forked /usr/local/bin/netperf as pid 5297
17:43:24 DEBUG: Started NetperfDemoRunner idx 6 ('TCP download BE')
17:43:25 DEBUG: Forked /usr/local/bin/netperf as pid 5299
17:43:25 DEBUG: Started NetperfDemoRunner idx 7 ('TCP download BK')
17:43:25 DEBUG: Forked /usr/local/bin/netperf as pid 5301
17:43:25 DEBUG: Started NetperfDemoRunner idx 8 ('TCP download CS5')
17:43:25 DEBUG: Forked /usr/local/bin/netperf as pid 5303
17:43:25 DEBUG: Started NetperfDemoRunner idx 9 ('TCP download EF')
17:43:25 DEBUG: Forked /usr/local/bin/netperf as pid 5305
17:43:25 DEBUG: Started NetperfDemoRunner idx 13 ('Ping (ms) UDP EF :: child 0')
17:43:25 DEBUG: Forked /usr/local/bin/netperf as pid 5307
17:43:25 DEBUG: Started NetperfDemoRunner idx 14 ('Ping (ms) UDP BK :: child 0')
17:43:25 DEBUG: Forked /usr/local/bin/netperf as pid 5309
17:43:25 DEBUG: Started NetperfDemoRunner idx 15 ('Ping (ms) UDP BE :: child 0')
17:43:25 DEBUG: Forked /usr/bin/fping as pid 5311
17:43:25 DEBUG: Ping (ms) ICMP: Starting watchdog with timeout 71
17:43:25 DEBUG: Started TimerRunner idx 16 ('Watchdog [Ping (ms) ICMP]')
17:43:25 DEBUG: Started PingRunner idx 16 ('Ping (ms) ICMP')
17:43:26 WARNING: Program exited non-zero.
17:43:26 WARNING: Command produced no valid data.
17:43:26 DEBUG: NetperfDemoRunner Ping (ms) UDP EF :: child 0 finished
17:43:26 WARNING: Program exited non-zero.
17:43:26 WARNING: Command produced no valid data.
17:43:26 DEBUG: NetperfDemoRunner Ping (ms) UDP BK :: child 0 finished
17:43:26 WARNING: Program exited non-zero.
17:43:26 WARNING: Command produced no valid data.
17:43:26 DEBUG: NetperfDemoRunner Ping (ms) UDP BE :: child 0 finished
17:43:31 WARNING: Program exited non-zero.
17:43:31 WARNING: Command produced no valid data.
17:43:31 DEBUG: NetperfDemoRunner TCP upload BE finished
17:43:31 WARNING: Program exited non-zero.
17:43:31 WARNING: Command produced no valid data.
17:43:31 DEBUG: NetperfDemoRunner TCP upload BK finished
17:43:31 WARNING: Program exited non-zero.
17:43:31 WARNING: Command produced no valid data.
17:43:31 DEBUG: NetperfDemoRunner TCP upload CS5 finished
17:43:31 WARNING: Program exited non-zero.
17:43:31 WARNING: Command produced no valid data.
17:43:31 DEBUG: NetperfDemoRunner TCP upload EF finished
17:43:31 WARNING: Program exited non-zero.
17:43:31 WARNING: Command produced no valid data.
17:43:31 DEBUG: NetperfDemoRunner TCP download BE finished
17:43:31 WARNING: Program exited non-zero.
17:43:31 WARNING: Command produced no valid data.
17:43:31 DEBUG: NetperfDemoRunner TCP download BK finished
17:43:31 WARNING: Program exited non-zero.
17:43:31 WARNING: Command produced no valid data.
17:43:31 DEBUG: NetperfDemoRunner TCP download CS5 finished
17:43:31 WARNING: Program exited non-zero.
17:43:31 WARNING: Command produced no valid data.
17:43:31 DEBUG: NetperfDemoRunner TCP download EF finished
17:44:35 DEBUG: PingRunner Ping (ms) ICMP finished
17:44:35 DEBUG: Runner aggregation finished
17:44:35 INFO: Data file written to /home/jmarks/rrul-2020-06-10T174324.389078.test.flent.gz.
17:44:35 DEBUG: Creating new DefaultFormatter
17:44:35 DEBUG: Loading data file /home/jmarks/rrul-2020-06-10T174324.389078.test.flent.gz
17:44:35 DEBUG: Executing test environment file /usr/share/flent/flent/tests/rrul.conf
17:44:35 DEBUG: No raw data found for series Ping (ms) UDP BE, falling back to computed values
17:44:35 DEBUG: No raw data found for series Ping (ms) UDP BK, falling back to computed values
17:44:35 DEBUG: No raw data found for series Ping (ms) UDP EF, falling back to computed values
17:44:35 DEBUG: No raw data found for series Ping (ms) avg, falling back to computed values