Ventana software support forum

aliakhavan89 wrote: ↑Mon Mar 25, 2024 9:28 pmDid you have something else in mind?

No, there are hundreds of places in Vensim where you can select text, that's why I asked for more info.

1. Does your model pass the units test?

2. Have you selected an appropriate time step? https://www.vensim.com/documentation/ref_time_step.html

It's impossible to comment further without the model.

Can you provide more detail please? Where are you clicking things? Can you give an example?

We'll get this fixed as soon as possible.

8.0.0 does not even run on modern Macs, you are best off using the latest version.

To give you a little more help, try this burning of coal = min ( available coal resources / time step , base burning rate ) This equation burns the "base burning rate" until all the "available coal resources" are used up. This equation takes "base burning rate" from the...

You do have units errors in your model.

Start with "base burning rate". That should not be measured in 1/year, I'm pretty certain it will be tonnes/year. Same for "base discovery rate". Correct the units for these, and you'll see where the error is.

All I did was put the graph onto the sketch using the IO tool.

Try the attached.

All you can use is the latest version.

1. there is a problem with the function under "plant growth", I can´t solve. You used "[" and "]" for brackets, you cannot do that unless working with subscripts. Change the equation to growth rate*consumption level*Environmental pollution*(1-(consumption level*Environ...

It should be independent of the folder. But it's impossible to help further without a published model to look at. If you have hard coded the path to a spreadsheet in the model, then that would cause this problem.

There are two things I do not like to see when reading papers. 1. Models that have unit errors or missing units. I immediately assume the model is full of errors. If the model cannot past this basic check, then it suggests to me that the author has not taken the time to make sure things are correct ...

Same answer as before, it's impossible to say anything as you haven't uploaded the model. We cannot possibly know why the lines are not moving without seeing the model.

Nub_User wrote: ↑Wed Mar 13, 2024 3:04 pm I mean I can´t open two or more models in the same instance.

You can only do this in Vensim Pro/DSS.

We would need the model and VPD file to offer any help. There is clearly an error in that file.

1/Is it possible to obtain a "*_sens_trace" file with variables in columns? Not any more. You can easily do what you need in Excel though. 3/About the .cin file, I suppose it is an error log, but what type of errors are highlighted? I only see variables equal to a specific value, but I do...

SAMPLE IF TRUE will hold a value until something is "true". So create a variable that equals 1 every 365 days, and use that in the call to SAMPLE IF TRUE.

EWUK wrote: ↑Sat Mar 09, 2024 1:32 pm One adding question to the last:

Why do the 4 curves in the graph not react to the slider variation of "interest rate"?
Greetings
U. Küppers

It's impossible to say as you haven't uploaded the model.

Click the Options menu on the graph, then "Number lines".

I'll see if I can improve the error reporting. Maybe if I just change ERROR: Cannot find constant in model To one of the following depending on what is in the optimization control file. ERROR: Constant not found in model, cannot continue. or ERROR: Constant found in model, but no subscripts in optim...

The old GUI is no longer supported. The new GUI already does quite a lot more than the old (such as vector graphics).

You can also find a SVG of the image you want, save it to the model folder and use that as an image.

It comes from Tom's blog, but I think there was a slight modification before we put it directly into Vensim. https://metasd.com/2010/03/pink-noise/ :MACRO: RANDOM PINK NOISE(mean, std deviation, correlation time, seed) RANDOM PINK NOISE = INTEG(updating pink noise,mean+std deviation*RANDOM NORMAL(-6...

Do you have an example you can provide? I can probably make changes very quickly.