estudio18.11 does not create a void-safe project by default (later versions may do so). Instead of using the Settings in the IDE, you may use a script eiffel-new to create a Void safe project that will include ESpec unit testing and Mathmodels libraries.

The script queries what name you would like for your project (e.g. calendar):

red> eiffel-new 
New Eiffel void-safe project name: calendar
red> ls
calendar

The new project is in the folder calendar.

estudio18.11 calendar/calendar.ecf&

Alternatively, you may download the following zip file:

Eiffel 17.05 Void Safe Starter Project

If you unzip it you will see

starter18.11/
├── eiffel-new
└── project
    ├── model
    ├── project.ecf
    ├── root
    │   └── root.e
    └── tests
        └── tests.e

eiffel-new is a python3 script (make sure it is executable) that will change the name project to one of your choice (say calendar).

> ./eiffel-new 
New Eiffel void-safe project name: calendar

Assuming python3 is installed on your system, the new name of the project will be calendar.

calendar
├── calendar.ecf
├── model
├── root
│   └── root.e
└── tests
    └── tests.e

If you are working on your own Laptop, you may obtain the Mathmodels library by logging in as anonymous (blank password) via:

svn export http://svn.eecs.yorku.ca/repos/sel-open/mathmodels/

You need to step an environmental variable $MATHMODELS. Something like:

export ISE_EIFFEL=/usr/local/Eiffel_18.11
export ISE_PLATFORM=macosx-x86-64
export MATHMODELS=/home/user/me/mathmodels
export PATH=$PATH:$ISE_EIFFEL/studio/spec/$ISE_PLATFORM/bin

Documentation for Mathmodels