How to get OPL-CPLEX?

Go to this website. 

Find the label “Get student and faculty editions for free” and click on it.

Click “Register” (top-right corner).

Type your institutional e-mail address under “Organization-Issued Email Address”

Go on with the registration (UiO is among the recognized universities, so the registration should work smoothly).

Once you are registered, sign in.

Type “CPLEX” in the search bar (“Product search”).

Choose the first result (“IBM ILOG CPLEX Optimization Studio v12.8 (CJ2IKML)”), and click “Add to cart”.

Download the software (you can choose among Windows, Linux and Mac versions) and install it normally.