Hi @Professor Yuan,
I am not certain what your model is designed to do based on my first look at it. Could you please provide an explanation of how your model is supposed to work? I understand that you'd like to push and pull items to/from a list, but a little extra information about your process would be helpful in solving the issue at hand. Thanks!
Most of the problem comes because the Processors all fill up and can't pull the next item because they can't get rid of their current item. Hopefully this helps/makes sense.
Here's my first suggestion in order to at least keep the model running. I used a Queue as a delay to help the items breathe between processes. Until we know what the priority is for each item and process, it's hard to know how we can fix this model.
Example Model: job-shop-pulling.fsm
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