Search found 137 matches

by Travis
Fri Jan 05, 2024 5:26 pm
Forum: Vensim
Topic: Unable to open Vensim
Replies: 7
Views: 7925

Re: Unable to open Vensim

Admin – Does Vensim run on Big Sur version 11.x still? I remember another thread where some people where having trouble with older version of macOS. Maybe Nicole should also consider updating macOS?

But the hidden file is the first thing to check...
by Travis
Wed Jan 03, 2024 6:28 pm
Forum: Vensim
Topic: impossible to switch back to the old gui a model built with the new guide
Replies: 19
Views: 14086

Re: impossible to switch back to the old gui a model built with the new guide

Also, a great way to put Vensim models on the web is SDEverywhere (sdeverywhere.org). An open source project that is used by several big models, including En-ROADS (www.En-ROADS.org).

SDE has been developed and used for approx 8 years. Tested and still under development.
by Travis
Sun Dec 24, 2023 8:11 pm
Forum: Vensim
Topic: Unable to open Vensim
Replies: 7
Views: 7925

Re: Unable to open Vensim

@nicole - what model of MacBook Air do you have?
by Travis
Thu Nov 16, 2023 4:02 pm
Forum: Vensim
Topic: Vensim PLE 10.1.2 crashing under macOS
Replies: 19
Views: 8662

Re: Vensim PLE 10.1.2 crashing under macOS

@mallari - thanks. Since your computer is pretty recent, I would suggest upgrading your version of macOS. Many developers support the current version (now 14) and maybe the previous two (12, 13). Ventana is doing a good job finding a solution for you, but you might start running into other software ...
by Travis
Wed Nov 15, 2023 7:19 pm
Forum: Vensim
Topic: Vensim PLE 10.1.2 crashing under macOS
Replies: 19
Views: 8662

Re: Vensim PLE 10.1.2 crashing under macOS

@mallari_cristina I'm glad it works now. What computer are you using? Could you tell us the model, year, and processor CPU?
by Travis
Thu Nov 02, 2023 11:58 pm
Forum: Vensim
Topic: Bug: Very precise time settings for model
Replies: 7
Views: 5187

Re: Bug: Very precise time settings for model

This makes sense. Thanks for the explanation. If I can be helpful in thinking through the UI/UX, let me know.
by Travis
Thu Nov 02, 2023 8:32 pm
Forum: Vensim
Topic: Bug: Very precise time settings for model
Replies: 7
Views: 5187

Re: Bug: Very precise time settings for model

I understand the admin's point of view, but I'll try to represent a new user's perspective. Vensim is a very complex and daunting tool. Decimals create a cognitive load (for anyone) and scare students (and sometimes modelers). If Vensim can help a user by only displaying complexity and precision whe...
by Travis
Thu Nov 02, 2023 8:25 pm
Forum: Vensim
Topic: Vensim Equation Auditing?
Replies: 5
Views: 1927

Re: Vensim Equation Auditing?

Robbie – this might not help you given how far along you are, but SDEverywhere includes performance measurement as part of its quality control tools. One way this has been used is to compare the performance of one version of the model with another. Sometimes this helps catch performance degradation ...
by Travis
Tue Oct 31, 2023 7:35 pm
Forum: Vensim
Topic: Bug: Very precise time settings for model
Replies: 7
Views: 5187

Re: Bug: Very precise time settings for model

Huh, I don't remember this level of precision in previous version of Vensim (e.g., v8). I would suggest limiting this since it isn't helpful for the user and is particularly weird when time is years, like this: [attachment=0]Screenshot 2023-10-31 at 3.29.56 PM.png[/attachment] Seems like it should b...
by Travis
Tue Oct 31, 2023 4:54 pm
Forum: Vensim
Topic: Bug: Very precise time settings for model
Replies: 7
Views: 5187

Bug: Very precise time settings for model

I don't remember this before, but it seems you can't have integer values for a model's INITIAL TIME or FINAL TIME. Or, at least, the formatters for the Model Settings window don't let you. I've tried removing the extraneous zeros but they always come back. Several models, not just one. Vensim 10.1, ...
by Travis
Tue Oct 31, 2023 4:38 pm
Forum: Vensim
Topic: feat: Add keyboard shortcut for Save As
Replies: 1
Views: 1185

feat: Add keyboard shortcut for Save As

There should be a keyboard shortcut for "Save As..." in the File menu. On macOS, most document-based applications use cmd-shift-S for the shortcut, which currently isn't used by Vensim. I recommend this. I needed to save a copy of a model and did the expected keyboard shortcut and it didn'...
by Travis
Tue Oct 31, 2023 4:35 pm
Forum: Vensim
Topic: BUG? Control-<number> not select analysis tool
Replies: 4
Views: 2116

Re: BUG? Control-<number> not select analysis tool

Any confirmation that you see this issue on macOS?
by Travis
Mon Oct 30, 2023 8:07 pm
Forum: Vensim
Topic: Random number generator; any tips to replicate?
Replies: 15
Views: 10507

Re: Random number generator; any tips to replicate?

Restating what I stated above for clarity: If a modeler wanted every RANDOM-based function in a model to be independent of all of the others (not drawing from the same pool), then the functions should be called with different STREAM_IDS (https://www.vensim.com/documentation/stream_id.html). Someone ...
by Travis
Mon Oct 30, 2023 6:31 pm
Forum: Vensim
Topic: Random number generator; any tips to replicate?
Replies: 15
Views: 10507

Re: Random number generator; any tips to replicate?

Interesting, some of that makes sense given my understanding of how RANDOM is working in Vensim. * The generator, for a particular "Stream", should generate the same values in the same order. * if you create a new variable that calls RANDOM() and additional time, that will use another valu...
by Travis
Mon Oct 30, 2023 1:16 pm
Forum: Vensim
Topic: Random number generator; any tips to replicate?
Replies: 15
Views: 10507

Re: Random number generator; any tips to replicate?

So if someone renames variables or reorders views (or whatever might cause the "everything else" equations to reorder), the results of the RANDOM() function would change? I read Tom's comment above that they would be more deterministic and always ordered the same. For instance, a model has...
by Travis
Fri Oct 27, 2023 8:49 pm
Forum: Vensim
Topic: Random number generator; any tips to replicate?
Replies: 15
Views: 10507

Re: Random number generator; any tips to replicate?

Reflecting on this a bit more... Again I'm grateful for your reply. Prevented a lot of headaches, I'm sure. I'm wondering how hard it would be to decipher or lookup Vensim's equation sorting. I'm not 100%, but I think the only rules SDE would need are the RANDOM-related rules. It seems like SDE woul...
by Travis
Fri Oct 27, 2023 8:41 pm
Forum: Vensim
Topic: BUG? Control-<number> not select analysis tool
Replies: 4
Views: 2116

Re: BUG? Control-<number> not select analysis tool

Yes, I'm on macOS.

Kinda related, but did custom Sketch Toolbars go away in the New UI? I only see Analysis Toolset in the Tools menu.
by Travis
Fri Oct 27, 2023 7:38 pm
Forum: Vensim
Topic: BUG? Control-<number> not select analysis tool
Replies: 4
Views: 2116

BUG? Control-<number> not select analysis tool

In prior versions of Vensim, there have been the keyboard shortcuts to select sketch tools or analysis tools. Sketch tools are 1,2,3,4,...q,w,e,... and analysis tools were control-1,2,3,4,...,q,w,e,... I can select sketch tools with shortcuts still (though less consistently than before) but I can't ...
by Travis
Thu Oct 26, 2023 2:58 pm
Forum: Vensim
Topic: Random number generator; any tips to replicate?
Replies: 15
Views: 10507

Re: Random number generator; any tips to replicate?

I'm glad I asked this before starting the journey! The equation ordering, and hence the order of rand() calls, seems like the most troublesome issue. SDE unrolls the the model equations, but probably in a way that is different than Vensim's implementation –– if only because there wasn't consideratio...
by Travis
Thu Oct 26, 2023 2:00 pm
Forum: Vensim
Topic: Random number generator; any tips to replicate?
Replies: 15
Views: 10507

Random number generator; any tips to replicate?

I'm looking into adding the RANDOM suite of functions to SDEverywhere.org. This would support converting vensim models that use those functions to the web more readily, along with targeting C and other platforms. From the [url=https://www.vensim.com/documentation/noise_rng.html]Vensim documentation[...
by Travis
Wed Oct 25, 2023 7:27 pm
Forum: Vensim
Topic: Opening a Stella model in Vensim
Replies: 17
Views: 5637

Re: Opening a Stella model in Vensim

Okay – that makes sense since the XMILE spec has "vendor-specific tags". Stella will have tags and Vensim could have tags for Vensim-only features too. Hopefully those extra tags are handled gracefully when being read by other applications –– that is the real key I would think. Import what...
by Travis
Wed Oct 25, 2023 4:17 pm
Forum: Vensim
Topic: Opening a Stella model in Vensim
Replies: 17
Views: 5637

Re: Opening a Stella model in Vensim

Do the models that failed still fail? Were they working in other applications?

I'm asking to get a sense of Vensim's XMILE support today and support in the future. If there are known issues it would be great to understand them better.
by Travis
Tue Oct 24, 2023 6:10 pm
Forum: Vensim
Topic: Opening a Stella model in Vensim
Replies: 17
Views: 5637

Re: Opening a Stella model in Vensim

Which models did you have that failed? Do they work now? Do you want me to see if they are valid in other tools?
by Travis
Mon Oct 23, 2023 5:00 pm
Forum: Vensim
Topic: Opening a Stella model in Vensim
Replies: 17
Views: 5637

Re: Opening a Stella model in Vensim

Ventana/Admin – A pointer, in case you didn't know about this: There are GitHub repositories for sample models that try to help with reference implementations. You can find them in the test-models repo of SDX (SD Exchange, I think it stood for) https://github.com/SDXorg/ . Currently there are lots o...
by Travis
Wed Oct 18, 2023 1:50 pm
Forum: Vensim
Topic: Opening a Stella model in Vensim
Replies: 17
Views: 5637

Re: Opening a Stella model in Vensim

If Stella doesn't conform to the standard, you should tell them. Did you reach out to them when there was a problem? They have been supportive of the XMILE file format and the standards working group, so I think they would fix something. Also, several other tools use the XMILE standard and seem inte...