>Hmm, that's odd. What's the output of `fping6 -D -c 1 localhost` ?

That was a helpful tip! Turns out, `/etc/hosts` had `::1` defined as `ip6-localhost`, adding `localhost` to the same row removed the error.

All that's left now is an
```
Ping (ms) UDP BE1: Adding child IrttRunner
which: /usr/local/sbin/irtt is not an executable file
which: /usr/local/bin/irtt is not an executable file
which: /usr/sbin/irtt is not an executable file
which: Found irtt executable at /usr/bin/irtt
UDP RTT test: Cannot use irtt runner (Irtt connection check failed: Error: read udp4 10.0.6.1:54698->10.0.14.2:2112: read: connection refused
). Using netperf UDP_RR
Ping (ms) UDP BE1: Adding child NetperfDemoRunner
which: /usr/local/sbin/netperf is not an executable file
which: /usr/local/bin/netperf is not an executable file
which: /usr/sbin/netperf is not an executable file
which: Found netperf executable at /usr/bin/netperf
```

(part of the verbose output) But the graph shows lines for every connection, as far as i can tell the netperf does not fail.

Still curious as to why the irtt connection might be refused, the irtt server shows no sign of connection establishment.

However, the initial Error has been fixed since the version update

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