Nlm11.18.0.0-ipv4-ipv6-win64.msi Jun 2026

Check Event Viewer → Windows Logs → Application for FlexNet errors. Common fix: License file syntax or missing vendor daemon ( .exe ).

Even if ICMPv6 works, many firewalls block arbitrary TCP ports for IPv6. Create explicit inbound rules for TCP ports 27000-27009 over IPv6 scope. nlm11.18.0.0-ipv4-ipv6-win64.msi

netsh interface teredo set state disabled netsh interface isatap set state disabled netsh interface 6to4 set state disabled Check Event Viewer → Windows Logs → Application