Ventana software support forum

Hi Bob,
Is there any promising progress regarding the native Mac OS X release of vensim? Vensim is almost my last link to windows OS, and I think I will be glad when I break that, too.

regards,
gonenc

Will there be a Vensim version that works on Mac OS 10.5.x and higher? Or from now on being Intel chipped Mac users, are we supposed to use Virtual PC type of software to use Vensim? (or boot the computer with Windows and work with Vensim)

Hi Monte, To be honest I don't have the prescription for becoming a good modeler. However, what I know is the fact that those advanced tools do not make any modeler a good modeler, they only make their life easier. An example about how I see it; a cruise computer or a navigator on a brand new car ma...

Hi Monte, I was curious about the source of that definition. Where did you get it? And on the other hand, do you think that a label such as being a system dynamicist will be an efficient motivation for people? To be honest, I won't be interested in a tool or field in order just to get a label tag. r...

Hi Monte, I would be looking the omission examples you mentioned from a different perspective. For example in the writing quality example you mention. Using quantifiable variables instead of the five soft variables may mean two things; Case 1: Level of clarity is a soft variable. You replace it with...

Hi JJ, That is exactly what I want to do. I also have a feeling that we are well behind full utilization of existing tools. Hence, I wish to make a personal survey to see what do we have and in what extend those can be used. If I can manage it, it will be something like the updated and maybe extende...

Hi Monte,
That is exactly what I mean. And thanks for the hint. I didn't realize that section in the book.
That was a quite useful remark.

gonenc

I still have a feeling that I am not making my quest clear enough. I am not after 'a' method to construct a model and complete a study that utilizes that model. The expression I am about to use will narrow down the scope of what I am after, but I think it will make it much more clear; I am wondering...

Thanks for the replies. I was a bit skeptical whether I was clear enough in the way I state my question, and Jean-Jacques' reply, which definitely makes sense, showed me that I was not. First of all about mu preoccupations, I think I fit into the all three categories you mention JJ. What I am after ...

Hi all, Just for personal curiosity I wish to make a survey on formal methods or tools proposed in the SD literature, aiming to support the modeling process (e.g. model parametrization, validation) or model analysis (sensitivity, loop dominance). Main motivation is the fact that during the last conf...

Thanks Jean-Jacques

In a model currently I am working on, I am willing to use an identical non-linear function between several variable couples. Is it possible to define this function once, maybe as a built-in function of vensim, and then use it in multiple points? Let's call the function f. What I want to learn is to ...

Thnaks a lot Bob and Tom, Now I am trying to figure out how to implement mutex in java. Another observation that may ring some bells; Problem seems to be setting the vensim to game mode (MENU>GAME) from one thread and later calling MENU>GAMEON from another thread. (Interesting thing is although appl...

Thanks Tony, After your comment I did some more debugging and experiment. Here is what happens. In the main thread, model is loaded and initialized in the game mode. When RePast starts, another thread starts and GAMEON command is passed in that thread. This is when code pauses. First experiment: Ins...

Thanks for the reply Bob, I have tried with a very simple java program. The sequence I follow is; * Load the model * Setup it in the game mode * Change some auxiliary values * Proceed game several tımes wıth GAMEON command * End game wıth ENDGAME Works perfectly f&#305...

Hi, I am working on a small demo model in order to see how I can connect Agent-based model with a SD model on Vensim. I have a strange problem. At a certain point in flow sequence in ABM, I am calling some methods like Vensim.command("GAME>GAMEINTERVAL|3); or Vensim.command( "SIMULATE>SETV...

Thanks for clarification Tony.

Hello to all, I am planning to integrate a Vensim model with an external code, and I want to change the model parameters of the Vensim model during a simulation run. Is it possible to do so by using SetVal command in the standard simulation mode? Or should I start the Vensim model in the game mode i...

Is anybody aware of a MatLab, C++ or Java code that can be used to transfer model equations from Vensim to a programming platform?

Or is anybody aware of anyone currently dealing with it?

regards,
gonenc