how to stop simulink file ?

Is there a way to stop a simulation that has been started using the sim command if the simulation is taking too long to complete? The simulation is being run from an m file inside a loop. I'm trying to optimise a model's parameters using a genetic algorithm. I've set a minimum step size to "auto" but there are certain combinations of parameters that are causing the simulation to hang because "unable to reduce the step size without violating a minimum step size " Thanks for your help

Answer 1

[Azzi Abdelmalek]

set_param(gcs, 'SimulationCommand', 'stop')