Ventana software support forum

Can you post the code that you are using?

Is it a recent version of Stella you are using David?

This usually happens when you use the compilation files from an old version of Vensim (eg, Vensim 5. with a newer version of Vensim.

Do you have more than one version of Vensim installed on your computer?

Try the following. 1. Start an optimization. 2. Select the parameter you are interested in as the payoff. 3. In the "optimization control" dialog, for "Sensitivity" select "All constants" and in the next box put in the number 10. 4. In the "optimization control&quo...

Once you have run your sensitivity simulations, Vensim creates two files in the same directory as the run. I think (as I'm not at my computer) they are called sortsens.tab and sens.tab.

Take a look at these two files as they may contain what you need.

Sable works in Microsoft Windows only.

The price lists should be on the left hand side of the page at
http://www.ventanasystems.co.uk/index.php?page=sable

Kind regards,

Tony.

Hello JJ,

I've never lost a message when replying to posts.

What browser are you using and I'll use the same one for a while to see if I can replicate the error.

Tony.

Add some text to the screen, and in it enter The @RUNNAME@ will be replaced with the current run name.

You can also use and the following to display the runs that are currently loaded.

If big vec is defined by several equations, it might happen, that the big vec sum equation is evaluated before let's say big vec[b3] gets a value.

Has this happened to you?

No you can't.

What are you trying to do?

3D graphs were removed from Vensim some time ago (but the help was not updated).

You will need to export to Excel (or similar) and plot there.

Have a look in the Vensim help at CIN files. These can be used to store the constants that are going to be used in a simulation.

Is this what you need to do?

What version of Vensim are you using?

Can you email me one of the files you are trying to load and I'll see if there is a problem with it?

Load it via the control panel instead (look for an icon on the top toolbar towards the right that has a picture a bit like a clock).

Hello,

I'm not entirely sure what you are doing here. Are you using Vensim, or the Vensim DLL? How are you adding the runname?

Kind regards,

Tony.

Hello, I don't recall selling a distribution licence to anyone with your email address recently. To display a custom graph, use the vensim_tool_command function (see http://www.vensim.com/documentation/index.html?26255.htm). You need to call it something like vensim_tool_command("CUSTOM>custom_...

Would you have some comments on how .NET is different from DLL (I believe there is a difference)? They are two different things, http://en.wikipedia.org/wiki/Dynamic-link_library http://en.wikipedia.org/wiki/.NET_Framework I cannot comment on any of the other questions (I last used Mathematica a lo...

I don't recall any Mathematica related questions cropping up on this forum. But if Mathematica can load DLLs and call functions within them, then it should be straightforward to load the Vensim DLL. DSS ships with examples of calling the DLL using Visual Basic, VBA, C++ and Java, it would just be a ...

I don't think there is a way of doing this (maybe someone else will chip in with a way).

I did a tutorial once for someone (but it is specific to that project). You will need Inno Setup Compiler - http://www.jrsoftware.org/ Download and install Inno. Create a sub-directory under your Sable project dir called "Install". Create a new text file called "setup.iss". Selec...

There are two simple ways of doing what you want. The first way is what Guido suggests (take into account the amount removed from the stock by outflow 1 when calculating outflow 2). The attached model "demo.mdl" demonstrates this. The second way is to proportionally allocate what is in the...

I can't help but to notice that the fact that 'something silly happens' if :NA: enters calculations does not really approach very robust program design. It looks to me that mapping a 'special value' like :NA: onto a numeric range should not be done if it can be avoided. Wouldn't C/C++ know things l...

:NA: in Vensim is usually used when working with external data to allow a test for missing values, it is not related to the NaN in any way.

I'd advise against using it in any other way purely because it does have a numeric value and can throw some silly calculation results.

I'm not sure what you are doing, but it sounds like you have the order of things mixed up. You can set constants before the simulation starts using a slidevar, and gaming vars during a game. If your changes require a 2nd simulation to take effect, maybe you have started the simulation before trying ...

You can specify the icon for the project (but not with SPK files, for some reason I cannot extract an icon from the archive, only a physical file). I'd suggest you create a custom install for your clients. I use Inno (it's free). All you need to do is create a directory in the client machine "M...