Majorana comes with several modules for pre-installed modules. If you install custom software, you might want to also create modules for them. Suppose that you have installed ARGoS 3.0.0-beta48 and created a module file in
$HOME/modulefiles/argos3. If you let lmod look in the default paths for a module called
argos3, it will not find your module file.
You can tell lmod to include your custom modules by altering the
MODULEPATH, for example by running
export MODULEPATH=$HOME/modulefiles/:$MODULEPATH. Instead of running this command in every session, you can also add it to your .bashrc (or similar) file. With the updated
MODULEPATH, lmod is able to find your custom modules.