event time is in past

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Yt6155mail asked Apr 22, '22 Logan Gold commented Apr 28, '22

event time is in past

"createvent: event time is in past: event time changed to present. Object: Source1 advancetime: -11.368785, time: 14109.910037 "

I'm getting an error like this.

There seems to be no way to resolve this error in the "Inter-Arrival time" setting.

How can I set it to avoid this error?

event_time_is_in_past_1.fsm

The same question was confirmed, but I couldn't find a specific solution.

https://answers.flexsim.com/questions/27196/system-error-createvent-event-time-is-in-past-even.html

https://answers.flexsim.com/questions/115443/understanding-error-event-time-changed-to-present.html

https://answers.flexsim.com/questions/77339/system-console-createvent-error.html

Software Version:

FlexSim 21.0.10

interarrival times event

1650587485991.png (81.5 KiB)

event-time-is-in-past-1.fsm (32.4 KiB)

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Logan Gold ♦♦ commented · Apr 28, 2022 at 09:28 PM

Hi @Yt6155mail, was Joerg Vogel's answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

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Answer 1 · 2022-04-22T05:14:35Z

Joerg Vogel answered Apr 22, '22 Jason Lightfoot commented Apr 25, '22

Math.max(0.01, normal(90,36.6,getstream(current))

a normal distribution can return negative values. Then tey are in the past.

You can prevent it with a mathematical function returning a value near zero if the result gets negative.

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Joerg Vogel commented · Apr 23, 2022 at 06:50 AM

if you choose deviation parameter value, which is larger than 3 sigma interval in comparison to your mean value, you get negative values.

normal(90,15) chance to get only positive values is ok.

normal(90,60) chance to get some negative values is an reasonable assumption.

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Yt6155mail Joerg Vogel commented · Apr 25, 2022 at 07:29 AM

＞Math.max(0.01, normal(90,36.6,getstream(current))

My sample model seems to automatically convert negative values to zero without using this code.

However, the error continues to occur.

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Jason Lightfoot ♦♦ Yt6155mail commented · Apr 25, 2022 at 03:01 PM

                      
                       Math.max(0.01, normal(90,36.6,getstream(current)))

You were missing a close parenthesis character. There are no errors when using this expression.

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