Please don't use a combiner with process flow. It is much easier to implement the functions of a combiner in a Process Flow Processor (ie Basic Processor).
A combiner has a strict input order and a special managment of collecting items together through PORTS, if you don't have ports, then a combiner doesn't work!
- First a container item enters the combiner through input port 1.
- Compontents are entering through input port 2 and above.
- A recipe depends only on items entering through input ports. There aren't any dependencies to attributes of entering items at all.
- You haven't got any options or picklist templates to aggregate label data of collected items.
If you want to integrate Process Flow logic you should control the order of items in queues previous to a combiner and update the components list by an attribute of the item entering through the input port 1.