To understand the student version, one must acknowledge its constraints, which are intentional. Typically, the Student Version is limited to 150 animated entities (the "parts" moving through the system) and a restricted number of modules. While this prevents modeling a massive automotive plant, it is perfectly adequate for 95% of university coursework, including call centers, inventory management (like (s, S) policies), manufacturing cells, and simple healthcare systems.
There is a limit on the number of entities and modules (typically around 150) that can be active in a single model. arena simulation student version