License Manager Error -9 - Linux, wifi versus ethernet

Got hit with the infamous " License checkout failed. License Manager Error -9 The hostid of your computer (000000000000) does not match the hostid of the license file "

The problem is that I switch from a ethernet connection (where eth0 is activated when I boot) to a wifi connection (where wlan0 is activated). When I activated the license the licence got associated with the mac address for eth0 since the computer was plugged through the ethernet port, but when I then tried to launch matlab in an environment where I was using only wifi, I got the licence error.

My current /etc/udev/rules.d/70-persistent-net.rules file has two entries: # PCI device 0x8086:0x08b1 (iwlwifi) ... # USB device 0x:0x (r815x) ...

iplink shows eth0 is not up (no hard link).

I gathered the problem could be solved by mucking around with the /etc/udev/rules.d folder, but how can I create a file which - lets me run matlab regardless of whether I happen to boot my computer with a wifi or a cable connection - does not disable my network by renaming an essential device and how should I name it ?

As a side-note, I'm getting really tired of matlab hampering my ability to use the expensive software, and really tired of having to jump through hoops and lose a lot of time every time I change my computer or update my distribution, so I'd appreciate a prompt and efficient answer.

Emmanuelle

[Jude D.]

Four years later and I still encounter this issue. Has anything been done to resolve it?

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/100235-why-can-t-i-activate-matlab-or-start-the-network-license-manager-in-a-newer-linux-environment