Repeat Random Streams giving different results

Question

question

Thomas JR asked May 06 2020 at 12:34 PM Thomas JR commented May 19 2020 at 11:02 AM

Repeat Random Streams giving different results

Hi folks

I have noticed that the tokens in the processflow sometimes change ID between runs despite having Repeat Random Streams active, which makes it very difficult to identify bugs.

Is there something hidden in FlexSim that I should be aware of that may cause this kind of behaviour?

Best regards

Thomas

Software Version:

FlexSim 20.0.2

debugging flexsim 20.0.2 repeat random streams

· 6

Joerg Vogel commented · May 06 2020 at 12:54 PM

Perhaps you have activated "Initialize random streams based on system time" in

File > Global Preferences > Environment

1 ·

initialize-random-stream-system-time.png (22.7 KiB)

Thomas JR Joerg Vogel commented · May 06 2020 at 1:25 PM

The field is unchecked in my FlexSim, but thanks for the answer!

Good to know for potential future applications.

0 ·

tannerp commented · May 06 2020 at 1:38 PM

Hi @Thomas JR,

Do you have a model you could upload with this issue that we could take a look at? And are you seeing this issue in Experimenter or just in normal test runs of the model?

0 ·

Thomas JR tannerp commented · May 06 2020 at 1:50 PM

Hi @tanner.p

Unfortunately not. I'm working on a large healthcare model that contains sensitive data and other elements.

The issue appears in normal test runs. I've yet to dive into the Experimenter.

0 ·

Benjamin W2 commented · May 18 2020 at 5:22 PM

Hi @Thomas JR, Was Matthew's comment helpful? Do you still need help with this?

0 ·

Thomas JR Benjamin W2 commented · May 19 2020 at 11:02 AM

Hi @Benjamin W2

Sorry, I did take a look at the section described, but I have yet to test if it resolves my problem.

0 ·

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Answer 1 · 2020-05-06T14:10:10Z

Matthew Gillespie answered May 06 2020 at 2:10 PM

This page in the user manual goes over some of the things that can cause you model to not be repeatable:

https://docs.flexsim.com/en/20.0/BestPractices/ModelRepeatability/

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