I am currently modelling a brewery process with four different types of beer. In the cooling process i have two parallel coolers and I want to split the liters contained in the order to the two coolers. For that i am using a split. When i simulate it though I get an error for the split (enclosed in screenshot). Where does this root error come from and how can I solve it? The type is an attribute contained in the order which implies which type of beer is being processed.