Although it is possible to generate an almost endless number of entities, each entity has associated memory costs. It is important to let Simulation Studio know when you are finished with an entity so that it can efficiently manage any memory issues related to entities. In a simulation model, you indicate you are finished using an entity by routing it to a Disposer block . When an entity enters a Disposer block, it is marked as free and reduces memory allocation costs at run time in the application.