Hello, I'm trying to do the same, but it's not working for me. Can you help me please ?
in my model i have 5 queues in a list. and I have two processes pulling from the list. the first is order delivery ("Preparation de commande") and the second is supply ("Approvisionnement"). I want the provisioning process to always have priority over the queue list. To do this, I put labels named Priority (4 for the delivery process and 3 for the supply process) and i use back order. but my delivery process still have the priority (i have a token in supply process, which is waiting for a queue, normaly it has to be a token of delivery process) i don't know why.
attached my model for detail.