Process Flow error about Exit Zone instance

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question

xiaocheng xie asked Apr 29, '19 Jordan Johnson commented Apr 30, '19

Process Flow error about Exit Zone instance

Hi guys, When i run a model using PF tools，some errors like the following appeared. from the message i know it is something about exit zone instance，but i don't know why. Any explainations or advises are appreciated!

exit-zone-error.fsm

Software Version:

FlexSim 18.2.3

processflow exit zone

exit-zone-error.png (30.6 KiB)

exit-zone-error.fsm (21.3 KiB)

Answer 1 · 2019-04-29T15:53:24Z

tannerp answered Apr 29, '19 Jordan Johnson commented Apr 30, '19

Hi @xiaocheng xie,

This exception can happen when there are too many events happening simultaneously. In order to alleviate the problem, you can simply add a Delay activity with time "0" in front of the Exit Zone activities. As I understand it, this gives the token one fraction of a second longer to "breathe" before another token enters and takes its place.

Hope this is helpful! Here's an updated model that runs without problems.

18824-exit-zone-error-1-1.fsm

small-delay-breathe.png (40.6 KiB)

18824-exit-zone-error-1-1.fsm (20.6 KiB)

· 3

xiaocheng xie commented · Apr 29, 2019 at 10:29 PM

@Tanner Poulton，

Thank you for your reply! yes,your method works, and I think it is a basic function to deal with simultaneous events.maybe in the furture development plan, you can improve this issue.

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tannerp xiaocheng xie commented · Apr 30, 2019 at 03:51 PM

Thank you for the feedback. There are a handful of instances where creating a "breathe" activity is necessary or helps avoid errors, so we might not be able to address them all, but this is one that we're aware of.

0 ·

Jordan Johnson ♦♦ xiaocheng xie commented · Apr 30, 2019 at 06:20 PM

This is actually a bug, which has been fixed, and will be released in the next bug fix release. For now, you can use Tanner's workaround.

0 ·

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