I have a problem with a model that I am making. I attached the model, as well as a screen capture in which I explain the logic of the model. In the "AGV's station" I have three AGV's which must go to "Charging station" to load a unit which will pass to "Process 1", then to "Process 2" and finally to "Download station". There really are two problems, when the AGV leaves the unit in the "Sink" it should return the AGV to "AGV's station" but it does not return, it stays in the "Download station". The second problem is that I want that when the first AGV is in charge of a unit and it is in "Process 1", another AGV must move to load another unit but it does not; This is because the process that I seek to simulate thus acts. I am new to the AGV's part and would greatly appreciate your support.