Ventana software support forum

I have correct my model and get a satisfied result due to your help.
Thank you very much!

Joy

when i was trying to run my model, vensim showed that model has errors and cannot be simulated. The reason is simultaneous equations involving. How to solve this problem?

thank you.
Joy

Ahh~ I see!!!

I shouldn`t have such a hypothesis! And the result of model running is normal!

Thank you very very very much!!!
I really appreciate your help!
Now I can finish my paper.

Joy

Thank you for your hints. I will take your advice. But I still cannnot understand how to make a "negative feedback look that ends basically comparing the level to the final value ". I have linked a lookup which slowly goes down. I have thought that it could make this feedback a negative on...

I have uploaded my model. I am sorry that I wrote it in Chinese. This may cause some trouble when you read it. If you think it is better to translate it into English, tell me and I will do it. My problem is: I need to research the curve of 培养水平. When I cha...

I am a student in China. And I have learned a little about SD and Vensim. Now I am working for my paper and I want to build a SD model. After I ran my simulation model, I found something wrong. When I changed a rate, the S-shape curve seemed much higher or lower than the baserun. But these S-shape c...