  This paper is the manual for an open source software that performs multiphase
split calculations. The provided software performs two-phase, three-phase and
four-phase flash calculations. The calculations are based on the Peng-Robinson
equation of state (PR-EOS). The four-phase calculation is achieved using a
geometrical solution in 3D for Rachford-Rice equations. The paper includes a
link to download the software and a step by step instructions are provided to
replicate an example from the literature.
