1. A graphical modeling system for executing a simulation of a graphical model, comprising: a memory; a storage location; and a simulation device having a mechanism for saving and restoring simulation state and simulation context, the mechanism to operate on the memory to read the simulation state and simulation context including non-mathematical variables, the mechanism to store the simulation state and simulation context in the storage location thereby saving the simulation at a particular point of simulation execution, the mechanism further to write the simulation state and context to the memory such that the simulation is restored.