model with rack 20.0.0 stops running

[poeychingneo]

[ FlexSim 20.0.0 ]

sample-rack-1.fsmAttached is a model with Rack setup in the old way, that is objects are connected to the Rack using 'A' connection. It is observed if model is run at max run speed, it will stop after sometime with some flowitems still in the rack not send out of rack even after dwell time is up.

I've tried 2 settings and both sees the same issue:

a) The rack is setup to have a max content of some small number like 30 with slot assignment of matching labels (without hasSpace).

b) The rack is setup to have slot assignment of matching labels (with hasSpace).

[philboboADSK · Accepted solution]

When you return a negative value from the Minimum Dwell Time field, then the rack doesn't release the item at all. You then have to call the releaseitem() command yourself. https://docs.flexsim.com/en/20.0/Reference/3DObjects/Warehousing/StorageObject/#flow

You are using a normal() distribution in the Minimum Dwell Time field, which can return negative values.

Once the rack has filled with unreleased items and the upstream processor can't send to it, then this model runs out of events and stops.

This model would behave the same way in the old version before any of the new rack changes.

[poeychingneo]

thank you. I realise the mistake I made. 🙂