You can save the state of your model to relaunch it again from the last state.
Save the state of your model using this command before starting the simulation
set_param('yourModelName','SaveFinalState','on','FinalStateName','myFinalStateVar','SaveCompleteFinalSimState','on')
and before launching the simulation again set the initial state of the model by using the command
set_param('yourModelName','LoadinitialState','on','InitialState','mySimState')
this way you will launch the simulation from exactly last state you left.