Ventana software support forum

Hi! I have an Excel sheet containing export streams from one region to another on different time dates (// indicate new column, --- indicate new row). From// To // 2018// 2019// 2020--- USA// Germany// 0// 10// 20--- USA// China// 10// 20// 30--- USA// USA// 0// 0// 0// Germany// USA// 5// 10// 20--...

Oh, I think I found the problematic variable.
In the huge model, I used "demand per capita" as an auxiliary with initial.
I did the same now in the small example (attached). Indicated demand and desired demand show the problem described in the first post.

Small examples like the attached one works also fine. But when doing the same in my huge simulation model, the wrong calculations occur.

Hi, I have an auxiliary variable in my Vensim (DSS 7.2.) model named demand product. My aim was to generate following variable: smooth demand product = SMOOTH(demand product, 1) I also tried: smooth demand product = INTEG((demand product - smooth demand product), demand product) The problem with bot...

Using for example "IF THEN ELSE(supplyGap >0, +200, -100)" would increase the price at time 2 BUT at time 3 (when supplyGap < 0) this condition will not allow the price to increase further. But I want to force the price increasing up until time 4 (even though the supplyGap is smaller than ...

Hi, my model should generate following behavior: If there is a supply gap > 0 (it means demand > production) then the price should increase by a fixed value for the next two years (also if the supply gap will be negative in the following years; this should be not considered in the price change rate)...

I uninstall the Pro Version and now it works fine. Thanks for your help!

Hi, if I double click on a mdl-file it is opened in Vensim Professional even though I owned Vensim DSS. Select "Always use the selected program" does not solve this problem. I am only able to use DSS if I put the mdl-file directly via drag and drop to the DSS desktop icon (this method is a...

Hello everyone,
is there a possibility to calculate a variable x at time t via the difference between another variable y at time t and variable x at time t-1 ?

x(t) = y(t) – x(t-1)

Thanks.