Ventana software support forum

Hello, I came across documentation on the ability to use LP_solve in Vensim and am interested in exploring this capability. However, I am getting errors that Vensim cannot open MultiExtLib.dll nor the VenextLP.dll. Does Vensim still support the use of these plugins? It looks old (~2013) so perhaps i...

Thanks for this. We have tried adjusting the printf-style (e.g. putting %.12f in the box to the right of "Scientific") but the table feature continues to only output 6 significant figures

Hello, we've only just noticed that Vensim is only calculating 6 significant figures. Is there a way to adjust this? We can't seem to find it in the model settings or options.

Great, thanks!

Hello, We've found that the Reform and Clean on Save option no longer works in DSS 8.2.1. It appears that the box with options is more limited than in previous versions as well. We tested this by viewing the code in a text file, selecting the option to reform by alphabetizing, then renaming one of t...

Hello, We've discovered what appears to be a bug when saving and exporting from a .mdl to a .vpmx. We are using the latest version of Vensim DSS (8.2.1). When we publish a model, the subscript control reduces all subscripts to a single selected element for each subscript. If we select additional ele...

Some colleagues and I are running Vensim off of laptops with two monitors plugged in with the laptop screen closed, so using two external monitors in extended desktop mode (Windows 10) We'll often move Vensim from one screen to another depending on what other programs we're using. We've noticed that...

No, that doesn't work. The first subscripted element can be changed by dragging a slider bar, but when clicking on the bar to expand the slider control options, the subscripts under "set subscript" are all ellipses and the "Edit" button doesn't do anything.

I'm not sure - where would I see this option? I don't see it in Tools>Options

In DSS on 8.x builds, variables that are read in constants (e.g. via GET DIRECT CONSTANTS) can no longer be edited in SyntheSim mode, though they used to be.

On DSS build 8.1.2 (and perhaps earlier) we noticed today that running the model in different ways produces different results: If we run the model by going to Sim Control>Set and then clicking Simulate, we get a different set of results than going to Sim Control>Simulate. This is particularly an iss...

We've noticed that when using multiple screens, if Vensim is moved between screens eventually we will be unable to open a Table and will have to restart Vensim. This is in 8.x builds.

Upon updating to 8.1.2 today, I now have to manually reload the custom graphset every time I launch a mode, even when the graphset was previously opened and saved. It may be a combability issue in that versions of our software are developed on a pre-8.1.2 build and Vensim no longer recognizes the sa...

In 8.1.2 (updated to this version from 8.0 earlier today) I can no longer resize the first column with the row name when bringing up a table. This is in 8.1.2 on Windows 10 x64.

Hi there, I'm still having this issue in Model Reader (using 8.0.6). When I click "Simulate" there is no "Changes" tab that appears. The "Changes" tab only appears when I run "SyntheSim" mode. Once in SyntheSim, the only options in the "Changes" tab ...

It's a good question but no, we specifically removed these from shared folders to avoid the crash from syncing that we've seen before.

I will e-mail along the model in a minute. I should be clearer here - the problem is not completely elminated in 6.4E. Vensim still occasionally will crash when running scripts. But it is much, much less frequent than when running any of the 7.x series models. We do not use FILE>COPY command. We use...

Hello, I'm having an issue where Vensim DSS is randomly crashing when I run command scripts (generated using Python) to do multiple runs. It appears this bug was introduced in the 7.x series of Vensim. I do not have have this problem as of the 6.4E release. Vensim will execute a seemingly random num...