Ventana software support forum

This kind of discussion can go on and on, and I'm sure you can find some info in the SD mailing list archives (http://www.ventanasystems.co.uk/forum/viewforum.php?f=34). But if it helps, I think of SD as trying to understand the "whole system". Mathematics comes into it, but the goal reall...

Are you exporting the following function?

int VEFCC version_info()
{
return(EXTERNAL_VERSION) ;
}

If it is not exported from the DLL, Vensim will be unable to call it (which is why I think you are getting -1).

You don't need to link to vensim.lib either with current versions of Vensim.

You are very limited with PLE (it is designed for learning, not for anything more advanced).

I think the only thing available to you is to display a table, then copy/paste the contents to a text document and work with that.

Tony.

It can be done directly from Vensim.

Chapter 14 of the DSS reference supplement details how it is done.

I would have thought at the very least the other apps could export to CSV and then imported into a database.

If anyone has any ideas on what they would like to see in Vensim, please let us know. Also if there is something that you feel could be made better, also reply to this and let us know your thoughts. If you have a question, please start a separate thread - we can't easily respond here. Thanks in adva...

No.

The only changes you can make is if you have the subscript ranges in Excel, you can read them in at the start of the simulation.

DDE will only help if you are changing subscript elements.

What kind of changes are you letting the users make?

You cannot do this. The DLL will fail to load a model with errors in it, so there is no need for the command.

You cannot change equations either using the Vensim DLL. Were you aware of that?

No, not at the moment.

http://www.ventanasystems.co.uk/forum/v ... f=2&t=4234

From the readme file, VDI are Vensim Database Input files.

You can get Vensim PLE for free.

You haven't exactly given us much to work on. Without access to the equations, there is little anyone can advise you on.

Why exactly does the graph look wrong? What happens at time = 10?

Start by defining units for everything in the model. It may point out why the graph is not displaying what you are expecting.

And why is the graph wrong? Can you give some more detail?

Can you email me directly regarding this (with your licence details)?

Many thanks,

Tony.
vensim@vensim.com

What version of Vensim are you running?

Click Help->About Vensim to get the info.

Tony.

Can you post the Excel spreadsheet and model (or just the equation to read the values from Excel) that you are using?

That way we can just modify it and show you how it's done.

Have you tried adding separate equations for each cohort that read from different ranges in the Excel workbook?

Can you send me an email (vensim@vensim.com) with your Vensim serial number (click Help->About Vensim) and I'll try and get the correct DLL for you.

If you have the unlock code that would be better.

Tony.

"Vensim first page appears", do you mean the startup screen? If it does, then it should be working.

What error appears after the Vensim first page?

In the last example I sent, I modified the code to load vendll32.dll from c:\windows\system32. In the VBA file, at the top it should look like this (I changed "vendll32.dll" to "C:\Windows\System32\vendll32.dll", so it should work on your computer). Private Declare Function vensi...

ok. Try publishing the model again, select package type "Other (using Vensim DLL)" and selecting the "caller" as Excel. You will need to look into the help system to do this properly. If you can reinstall Vensim DSS ensuring that vendll32.dll is installed, it will all work ok for...

You do not need the model open in Vensim for it to work.

What happens when you run the macro?

Open Excel, you do not need the model reader or Vensim DSS open.

Now run the "RunModelMultipleTimes" macro.

As far as I'm aware, the only way is to write your own external function to do it.

Tony.

What happens if you try

BUTTON,"Export Dataset",11,14,,,,,"MENU>VDF2XLS",