Hi! AnyLogic model is single threaded. This means that the simulation engine jumps from one event to another executing its actions. Therefore if an event freezes (e.g. in an infinite loop) then the whole simulation freezes. There is an infinite loop in your case (the one with time condition) because engine could not advance time without finishing the event code. And the event code cannot be finished because time is the same. I would do this: 1. change time scale 2. create a dynamic event (create_MyDynamicEvent( 3600 ) ) where MyDynamicEvent is an event with code changing time scale back to 1. Please let me know if it helps!

Hi Maxim, I hoped there would be another possible way to achieve the solution. Because, then, I would probably have to recreate the whole world just to fast forward with a dynamic event (which is my whole experiment, in this case) ? Regards,

Hi! Dynamic Event is an element of a model, you don't need to recreate the whole model. The DE is one of the simplest ways to generate events (e.g. speedup at model time 3600 or slowdown at time 5600). Technically there are two types of events: event and dynamic event. The difference between the event and the dynamic event is that the dynamic event deletes itself after its action is executed. Dynamic events are used to schedule any number of concurrent and independent events. To create new dynamic event instance, use the method that is generated automatically by AnyLogic for every dynamic event declared on the active object diagram (e.g. create_MySpeedupEvent( 3600 ) ). Regards, Max

Thank you. I have tried to add two events. One of them is speeding up and other one is slowing down back to original speed of the simulation. I call the speeding event and when I am done (perfectly it could be called inside the speed up function) I call the slowing back to original speed event. Eventually it totally fit my needs. Thank you.