ack of simulation results

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Isabela179
Junior Member
Posts: 3
Joined: Fri Jul 12, 2024 6:40 pm
Vensim version: PLE

ack of simulation results

Why isn't the simulation working and why are the results constant even though everything is correctly defined? Please help me, I need it immediately
Posts: 4658
Joined: Wed Mar 05, 2003 3:10 am

Re: ack of simulation results

Can you upload the model? Then provide some more details about what is not working.
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391

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Isabela179
Junior Member
Posts: 3
Joined: Fri Jul 12, 2024 6:40 pm
Vensim version: PLE

Re: ack of simulation results

This is my model, as you can see, if you press the simulation button, you'll notice that the results are constant
Attachments
moddel.vmfx
tomfid
Posts: 3841
Joined: Wed May 24, 2006 4:54 am

Re: ack of simulation results

I think what you're seeing is correct.

The stock Cena is constant because the flow Zmiana ceny is 0. That happens because Cena = Cena rynkowa.

I find the table tool most useful for diagnosing problems like this.
Isabela179
Junior Member
Posts: 3
Joined: Fri Jul 12, 2024 6:40 pm
Vensim version: PLE

Re: ack of simulation results

Do You know how can I fix this?
LAUJJL
Senior Member
Posts: 1443
Joined: Fri May 23, 2003 10:09 am
Vensim version: DSS

Re: ack of simulation results

There is a bug in your model. To find it you must understand why Cena stays equal to Cena rynkowa all the time. Start at time 0, and verify all the variables and their equations starting from Cena using the uses tree that have an influence on Cena rynkowa. if you do that with care, you will find the bug. You can start too from Cena rynkowa, using the causes tree, looking for the variables and their equations that influence Cena rynkowa.

JJ