Ventana software support forum

This is probably the most easiest question but I am having serious issue in calculating the demand in my model. I have some stock 'clothes in wardrobe'. Each year 50% goes to landfill and rest is re-used. While clothes stay in wardrobe for almost 7 years. On the basis of stocks I want vensim to calc...

please ignore the multiply sign in the equation. It was a typo. I still need help in this

Hi, I am trying to add 2 fixed delay functions in one equation. Example: DELAY FIXED( supply of new items*, lifetime of new items, 0) + DELAY FIXED(supply of old items, lifetime of old items, 0) It shows error of 'info beyond the final closing) - check for an extra)' Although I have tried to fix but...

Indeed my question was not clear. for example my model calculated the stock over period of 50 years (2000-2050). Now from this calculation I want to know the stock at one particular year lets say 2015. How Can i get this value? I tried to do by using GET DATA AT TIME but my vensim says it is not sup...

I need help that I want to retrieve only data of one particular year from stock of 100 years. Lookup functions needs two data sets but what if i just know the year but not the stock in that year. How Vensim can get only one value from stock of 100 years? Thank you

Hi, when I upload my excel file, I can see the data has been uploaded. But when I run the model, this message appears: The variable require a data file be specified. (screenshot also attached[])
I might be skipping a step. But I could not figure out. Any tutorial video on this?

Hey all,
I would be rather asking something really basic, as I am new to Vensim. I could not figure out that how can I take the average of only certain time period (lets say first ten years) of from the data in stock?