Ventana software support forum

There isn't a way to run the loop. The next release, it can export multiple files to the same output file. For example, you select a.vdfx and b.vdfx and get exportedfiles.tab. Is that what you need here or do you need a.vdfx -> a.tab and b.vdfx -> b.tab. In fact, I'll insert some extra code to allow...

Can you contact the author and ask for the original model file?

When the dialog appears with all the constants, you double click the value to the right and change it. Then click OK and it should appear as a change in the run config.

I can open the model without problems.

What errors are you getting?

"Sales" in your model is measured in "$/Month". That's a rate, but you are accumulating the "change in sales" and not resetting "Sales" at all. Is this your intention? I think maybe that this is the cause of the problem, "sales" keeps accumulating, b...

I think this is a case of floating point errors (https://www.google.com/search?client=fi ... int+errors).

Can you share the larger model? It might be a different reason for the accumulation.

Don't compare with 6.3, that is over 10 years old. A lot has changed since then.

Make sure you install using admin permissions. vendll64.dll will be installed to c:\windows\system32, do not change this path or it will not work.

No, VdpDLL64.dll is no longer provided. That was a double precision version of the Vensim DLL, all versions of Vensim are now double precision so no need for a separate DLL. If Vensim has been installed properly, vendll64.dll will be present in the path (C:\Windows\System32). There should be no need...

The code is still loading the 32 bit DLL, have you tried loading vendll64.dll instead?

It's impossible to say why it's not working given the limited information you have provided.

But a return value of 0 indicates the function was called correctly. So I would double check your path to the VDFX file and the variable name.

It's important to try and understand how levels/rates are calculated and used in Vensim. stock (time) = stock (time-time step) + sum of rates * time step Given you have a small time step, the value of "CH Patients" increases slowly. Do you need to add all 7 patients into the "CH Patie...

First thing, when debugging a model, make sure the save period (saveper) is the same as time step. You can do this by editing the equation for saveper, or clicking Model->Settings->Time bounds and ticking "Save results every time step". You are almost certainly missing results as you are n...

I'll get in touch with the SDM_Doc developers, they might be able to help.

Unfortunately there is no way to do this at the moment. I'll ticket it for improvement.

Can you provide more details? Maybe we can do something in the user interface so make the solution clearer?

We no longer supply that, you should be able to use vendll32.dll.

Probably X IF MISSING. Data variables are calculated only once before a simulation starts, so if you are running sensitivity/optimization, X IF MISSING will execute once, the IF THEN ELSE will execute every time the model is run.

We should probably add a licence to the models that we developed and ship with Vensim. I'll get onto that.

The world model, I think it's safe to assume that it is in the public domain so you can extend it as you wish.

Click File->New text file to create a CIN file. But I'm not sure this is what you need. Not sure if you are on the latest version of Vensim. Here are some options. 1. Run configurations. Beside the simulate button, you'll see a small triangle. Click this, you can now set up four scenarios and have a...

It's not possible at the moment. I'll ticket it for improvement, as long as the toolkit we use supports it on both Mac/Windows, we should be able to do something.

The commands you need are
SIMULATE>KALMANPAYOFF
SIMULATE>KALMANPARAMETER

Can you provide more detail? What outcomes are you looking at?

And have you selected a suitably small time step?
https://www.vensim.com/documentation/re ... =time+step

Option 1 : No, it's not possible in PLE+ either. Only things that actually appear are drawn (for performance reasons), if something is off sketch, effectively it's not there, which is why the tool doesn't work. This will be fixed in the next release.

It's not possible at present. But it is ticketed for improvement.

This will be fixed in the next release.