question

Let's take a look at what's visible when the model stops acquiring resources. First, look at the Resources themselves.

The green circle shows the number of tokens that have acquired that resource, and the red circle shows the number of tokens waiting to acquire the resource. Since the Stretchers has a resource count of 2 and the nurses a resource count of 3, no additional resources can be acquired. If you click on one of the circles, a window pops up to let you view each of the tokens.

The top list shows the active, or acquired tokens, and the bottom list shows the requests, or waiting to acquire tokens. Clicking on the first active token we can see where the token is in the model and what all of its label values are. In this case, we can see that its sitting in the Discharge? activity. Click the binoculars to the right to view the activity or click the Select Token button to select the token.

The Discharge? activity has a number of tokens in it. If you select token id:1 (the very right token), the Quick Properties populates with information about the token. If you look at the Shared Assets pane, you can see that this token still has a Nurse resource allocated.

It appears that you have not released the Nurse resource in your Emergency - Patient flow. Looking at your Release nurse from current activity activity, the Resource you're releasing is assigned to the label resource as opposed to the label nurse.

Hope that helps with how to debug issues in your model.