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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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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 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 the `buildInputs` of their project. Usually this paradigm follows along with
https://direnv.net/[`direnv`] + https://direnv.net/[`direnv`]
https://nixos.wiki/wiki/Development_environment_with_nix-shell#Using_Direnv[`shell.nix`] + https://nixos.wiki/wiki/Development_environment_with_nix-shell#Using_Direnv[`shell.nix`]
/ https://nixos.wiki/wiki/Flakes#Direnv_integration[`flake.nix`] setup. For / 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 example you can create in your project a `shell.nix`, or define `devShell` in
your `flake.nix` similarly to this: 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 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]. 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 == Previous work / Credits
Core parts of this repo are based on Core parts of this repo are based on