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Update README with license host id issue

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Doron Behar 2021-09-07 20:47:40 +03:00
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33
README.adoc
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@ -125,8 +125,8 @@ TODO
Some people may wish to not install matlab globally, and only making it part of
the `buildInputs` of their project. Usually this paradigm follows along with
https://direnv.net/[`direnv`] +
https://nixos.wiki/wiki/Development_environment_with_nix-shell#Using_Direnv[`shell.nix`]
https://direnv.net/[`direnv`]
+ https://nixos.wiki/wiki/Development_environment_with_nix-shell#Using_Direnv[`shell.nix`]
/ https://nixos.wiki/wiki/Flakes#Direnv_integration[`flake.nix`] setup. For
example you can create in your project a `shell.nix`, or define `devShell` in
your `flake.nix` similarly to this:
@ -149,6 +149,35 @@ pkgs.mkShell {
Note that Matlab still needs to be installed in a user-writeable location for
this `shellHook` to work, as explained xref:#user-content-install[here].
== FAQ
=== Matlab says that my license was installed for a different Host ID, why does it happen?
I haven't had reports of this issue by users of this repo, but I experience it
myself sometimes, and I think it's a good thing to include in this README. I
use Gnome with NetworkManager on my laptop, and rarely I use USB tethering with
my Android. From some reason while I'm tethered, I get the following error when
I launch matlab from the command line:
----
The hostid of your computer ("000000000000 111111111111") does not match the hostid of the license
file (XXXXXXXXXXXX).
----
I get this error although I set in my `/etc/nixos/configuration.nix`:
[source,nix]
----
networking.hostId = "6b216943" # fake id
----
As explained in the https://www.mathworks.com/support/lme/R2021a/9[link in the
full error message], I can reactivate the license and not go again through the
whole installation procedure. But I will be required to reactivate the license
again afterwards when I switch again to WiFi internet connection. It's somewhat
annoying, and I haven't found a solution / explanation why does my host id
changes when I switch to a wired connection.
== Previous work / Credits
Core parts of this repo are based on