question

There are code templates in Break To function on panel Taskexecuter like:

Same Load Station

Same Unload Station.

It is a common practice to understand what such code does. Then you can use it or change it in a way that suits you most. Perhaps the default code will do what you want to achieve already. Maybe you have to prevent to collect more items from different stations by returning 0 to end Break To if last item of a station is loaded. Additionally you can dynamically increase priority of involved tasksequences after loading an item to convince the FlexSim engine to unload first when a transport has taken place to a destination.