question

When multiple tokens are waiting for the same event of the same object(s), the activity will release all tokens unless you have a way to filter what tokens are released. Usually, you would use the operations for “Match” or “Match Value” for this. Then tokens that match some aspect of the event data will be released instead. Match and Match Value are similar but with a key difference. Since you asked about it here’s how they work:

The Match operation expects a label on the token to have data that can match the event data for the event. In The case of OnEntry you can either match with the Flowitem that entered the object or the Input port on the object the item arrived on. So you would choose a label on the token whose data is either a reference to the item entering the queue or a label that has number data that represents an input port on the Queue. The token with the matching data is then released.

When using Match Value, rather than choosing a label with the matching data, you would type in the value you want to match explicitly into the Label name/Value column. For example if you were matching based on port connection you would type the number 2 into the column if the OnEntry event fired for port 2 on the Queue.

In your case however, you don’t have a way to match up very well to either of those event data that the OnEntry event offers. The tokens have no association with the items, and all the queues just have the 1 input port so you can’t match on that either.

However you do have a reference to each queue object on the tokens using your QueueName label, this gives a way to do what you want by changing how you listen to the OnEntry event. Rather than listening the Group or each Queue individually, in the Wait for Event activity’s Object field put in your label token.QueueName. That way each token only listens to the queue they are assigned to rather than listening to all the queues.