These days I was learning using the agv module by practising the software help examples 。In TASK 4.3 - USING ELEVATORS WITH AGVS, the model always get back this error message below:
time: 413.199238 exception: Error: Invalid triggering event, event rank 1, at wait for event activity "Wait for Item to be Unloaded" in "AGV"。
Come here ask for help !