Search found 4584 matches

by Administrator
Wed Apr 17, 2024 7:18 am
Forum: Vensim
Topic: Vensim-Integration-with-External-Applications
Replies: 1
Views: 37

Re: Vensim-Integration-with-External-Applications

- How I can achieve this objective to supply this data ( Rates R1, R2, R3 and R4) to Vensim Model dynamically (as they are changing every hour) to generate simulations? You would need Vensim PLE+, Pro or DSS to link to external data. One way you can do it in PLE is to use a lookup table. - Is there...
by Administrator
Mon Apr 15, 2024 7:08 am
Forum: Vensim
Topic: SINTEG with vars
Replies: 4
Views: 62

Re: SINTEG with vars

This is correct (it's mentioned in the help system that the min/max etc must be numbers).
https://www.vensim.com/documentation/fn ... l?q=sinteg
by Administrator
Mon Apr 15, 2024 7:06 am
Forum: Vensim
Topic: Integration techniques: Impacts on Stock behavior
Replies: 4
Views: 111

Re: Integration techniques: Impacts on Stock behavior

It's impossible to offer any advice without a model to look at.
by Administrator
Mon Apr 15, 2024 7:05 am
Forum: Vensim
Topic: Odd occurance of Vensim freezing system with no run name BUT ...
Replies: 3
Views: 84

Re: Odd occurance of Vensim freezing system with no run name BUT ...

What version of Vensim are you using and on Mac or Windows?

I've just tried this on the latest version and it seems fine.
by Administrator
Sun Apr 14, 2024 4:37 am
Forum: System Dynamics Discussion
Topic: World 3 Model Download
Replies: 5
Views: 163

Re: World 3 Model Download

At the foot of the page, it details where you can find them on your computer. The location of the Models directory varies by platform. Normally the full path for this directory is •c:\Documents and Settings\All Users\Vensim\Models (Windows XP), •c:\Users\Public\Vensim\Models (Windows Vista/7/8/10/11...
by Administrator
Fri Apr 12, 2024 3:19 pm
Forum: Vensim
Topic: downloading 32 or 64 bit Python version for web publishing
Replies: 4
Views: 113

Re: downloading 32 àr 64 vit Python version for web publishing

I don't think it actually matters. During development we used the 32 bit version, but I'm sure 64 bit will work fine too.
by Administrator
Fri Apr 12, 2024 12:33 pm
Forum: Vensim
Topic: Chart with two axes (primary and secondary) consult
Replies: 1
Views: 71

Re: Chart with two axes (primary and secondary) consult

Create a custom graph, add two variables and make sure you do not click the "Inherit scale" checkbox for the 2nd variable.
by Administrator
Thu Apr 11, 2024 8:28 am
Forum: System Dynamics Discussion
Topic: Floating Point Error
Replies: 1
Views: 51

Re: Floating Point Error

You will need to upload the model.

It's either division by zero, or one of your variables is exponentially growing. Impossible to say without seeing the model.
by Administrator
Tue Apr 09, 2024 11:35 am
Forum: Vensim
Topic: CMD script macOS problem
Replies: 6
Views: 124

Re: CMD script macOS problem

This fires up the command script successfully for me (run from a terminal prompt)

/Applications/VensimDSS.app/Contents/MacOS/VensimDSS /Users/tony/Downloads/TravisForumProblem/SampleCMDScript.cmd
by Administrator
Tue Apr 09, 2024 11:24 am
Forum: Vensim
Topic: CMD script macOS problem
Replies: 6
Views: 124

Re: CMD script macOS problem

What happens if you turn off
SPECIAL>NOINTERACTION
by Administrator
Mon Apr 08, 2024 5:30 pm
Forum: System Dynamics Discussion
Topic: World 3 Model Download
Replies: 5
Views: 163

Re: World 3 Model Download

Are you on Mac or Windows?

Take a look at the following page, it details exactly where to find the models on Mac/Windows.
https://www.vensim.com/documentation/models.html
by Administrator
Mon Apr 08, 2024 8:07 am
Forum: Vensim
Topic: Lables on Flows
Replies: 2
Views: 102

Re: Lables on Flows

Looking in more detail at this, if you move the variable attached to the flow, it does move to the correct place. The next release will have this fixed.
by Administrator
Sat Apr 06, 2024 6:44 am
Forum: Vensim
Topic: Help me with Staff model
Replies: 5
Views: 124

Re: Help me with Staff model

All in the help system including examples.
https://www.vensim.com/documentation/fn ... ml?q=queue
by Administrator
Sat Apr 06, 2024 6:43 am
Forum: System Dynamics Discussion
Topic: World 3 Model Download
Replies: 5
Views: 163

Re: World 3 Model Download

It's available with Vensim.

On Windows, you should find it in
C:\Users\Public\Vensim\Models\Sample\WRLD3-03
by Administrator
Fri Apr 05, 2024 5:13 pm
Forum: Vensim
Topic: Help me with Staff model
Replies: 5
Views: 124

Re: Help me with Staff model

You could also consider a queue instead as you can remove things from one of those.
by Administrator
Fri Apr 05, 2024 3:07 pm
Forum: Vensim
Topic: Help me with Staff model
Replies: 5
Views: 124

Re: Help me with Staff model

I'd start by removing "people quitting" and thinking about implementing it in a different way. The equation is too complex for that anyway. As you are directly delaying "People to train" to calculate "People trained", if you do have people quitting, "Training"...
by Administrator
Wed Mar 27, 2024 1:36 pm
Forum: Vensim
Topic: double-click selection
Replies: 5
Views: 175

Re: double-click selection

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.
by Administrator
Tue Mar 26, 2024 1:06 pm
Forum: System Dynamics Discussion
Topic: Cumulative flow does not match stock
Replies: 2
Views: 148

Re: Cumulative flow does not match stock

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.
by Administrator
Mon Mar 25, 2024 9:09 pm
Forum: Vensim
Topic: double-click selection
Replies: 5
Views: 175

Re: double-click selection

Can you provide more detail please? Where are you clicking things? Can you give an example?
by Administrator
Mon Mar 25, 2024 6:58 pm
Forum: Vensim
Topic: Lables on Flows
Replies: 2
Views: 102

Re: Lables on Flows

We'll get this fixed as soon as possible.
by Administrator
Sat Mar 23, 2024 8:55 pm
Forum: Vensim
Topic: Vensim 8.0.0 download
Replies: 3
Views: 171

Re: Vensim 8.0.0 download

8.0.0 does not even run on modern Macs, you are best off using the latest version.
by Administrator
Sat Mar 23, 2024 6:27 pm
Forum: Vensim
Topic: Floating Point Error
Replies: 3
Views: 104

Re: Floating Point Error

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...
by Administrator
Sat Mar 23, 2024 6:24 pm
Forum: Vensim
Topic: Floating Point Error
Replies: 3
Views: 104

Re: Floating Point Error

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.
by Administrator
Sat Mar 23, 2024 7:41 am
Forum: Vensim
Topic: it is frustrating!
Replies: 25
Views: 718

Re: it is frustrating!

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