question

Sebastian Hemmann asked Apr 9, '19 Joshua S commented Apr 9, '19

Send to Port by Expression default?

Hi,

attached an example model in which I create 4 Types of items but set the Queue with 3 Outputports to By Expression = item.Type.

In my mind all Items with Type 4 should be never released!?

Sadly they are (and I can´t figure out why and how).

sendtoportbyexpression.fsm

Software Version:

FlexSim 19.0.2

send to port items type

sendtoportbyexpression.fsm (18.1 KiB)

Paula Carneiro Martins answered Apr 9, '19 Joshua S commented Apr 9, '19

Hello Sebastian,

If you check the box the option Reevalute Sendto on Downstream Availabily it will work.

Seems like the problem just occurs when you have processors in downstream, as you can see in the model

18422-sendtoportbyexpression-1.fsm

print-byexpression.png (37.5 KiB)

18422-sendtoportbyexpression-1.fsm (137.0 KiB)

· 2

Sebastian Hemmann commented · Apr 09, 2019 at 06:08 PM

Thank you @Paula Carneiro Martins,

you are right. This seems to solve the problem.

But I´m further looking for a "why" this is happening!? Sadly even in the user manual no explanation about why this could happen is to find. Appart from this that I assumed if this checkbox has to be checked to work this way, this setting should be turned on by default...

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Joshua S Sebastian Hemmann commented · Apr 09, 2019 at 07:54 PM

Looks liek a bug, I submitted this to the dev team, Here's a model where it shows the items being pushed in a busy system, where if the system is more relaxed it works how it should.

18422-sendtoportbyexpression.fsm

0 ·

18422-sendtoportbyexpression.fsm (131.4 KiB)