Ventana software support forum

Thanks for your quick reply! I was using the "Sensitivty2All" from the toolbox where these options aren't available. I can now see them via the simulation controls. However, when I try to run Sensitivity2All for selected variables, Vensim keeps showing the process window including the litt...

Is there a way to include only selected constants in "Sensitivity2All"? I've created a number of variables in my model to read in constants or time series data from an Excel spreadsheet or to implement policy scenarios and "activate" them ("policy sliders"). However, I ...

Thank you for your feedback.

Does that pick up on what I had outlined? So, are you suggesting creating variables “x” and “y” and then using an IF THEN ELSE function in the parameter itself?

Hello everyone, I am looking for an elegant way to use a slider in a very extensive model to decide whether time series (“GET XLS DATA...”) or only constant (average) values (“GET XLS CONSTANTS...”) should be read in from the same EXCEL file. I thought this would be very helpful for calibration, tes...

Hello all, I have a small request to which I have unfortunately not yet found a solution. There are cases in which dividing or multiplying by the TIME STEP is helpful in assigning a time unit to a variable and thereby avoiding unit errors. Example: I want to determine total cost of all annual public...

It's interesting to see that others also experience these problems. Thanks for your replies! I've been using Vensim 9.3 for a couple of days now and so far the problems described above seem to have been largely solved, many thanks! Maybe there are still some minor problems if I noticed correctly, bu...

EDIT: The problem described above might be related to the following: I've been setting up a new laptop and moved files over from the one I've been working with so far. However, when I open existing project files, the design of the sketch sometimes gets strangely adjusted (see attachment). These circ...

Dear all, I'm having the follwing problem in Vensim 9.2.4 (for Windows), which didn't seem to occur in older versions, if I remember correctly. At least I dind't notice this strongly... As you know, each element in the sketch is by default enclosed in a clear box whose dimensions can be adjusted by ...

Some time has passed and I wanted to give some feedback. Thank you so much for sharing the model (TranspoExcerpt.mdl). The model has been incredibly helpful!! I can hardly emphasise that enough. It was helpful and valuable both in terms of our mobility research and in terms of what I have learned ab...

Hey, many thanks for your thoughts and suggestions! I’m back at work and motivated to take up the ideas and improve my understanding.

I would be happy to have a look at that model you’ve mentioned, but can't find an attachment. Is this a problem on my side?

Best wishes!

Does anyone have an idea? @tomfid Would you mind looking at my problem again? I would be very happy to receive tips!

Best wishes everyone!

Unfortunately, I have to come back to my problem. I have started simple and elaborated step-by-step. So far this has worked quite well. However, I realized that in some cases it doesn't make sense defining variables as stocks. For example, current “Car Usage”, at least in my understanding, does not ...

EDIT: With regard to question 1, that would also be possible for “Attractiveness for Driving”, wouldn’t it? When combining a stock “A” to a stock “B” I link the inflows and outflows and add a variable that accounts for the effect a change in stock A has on stock B. This would allow me to take more e...

Many thanks for your quick reply! This was very helpful and the idea to use some long term smoothed function makes sense to me. I already tried to implement your suggestions yesterday and have continued to work on the stocks today. 2 short questions about this: 1. Wouldn’t it in some cases also make...

Hello everyone, I’m a researcher from Germany and system dynamics modeling in Vensim, which I’m becoming more and more enthusiastic about, is new to me. I have encountered many of the excellent sources for learning and now have a question that came up while developing my first model. As a start, I w...