Search found 1421 matches

by LAUJJL
Sat Mar 23, 2024 3:08 pm
Forum: Vensim
Topic: Floating Point Error
Replies: 3
Views: 71

Re: Floating Point Error

Hi Checking the units and equation does not prove that your model is correct. The floating-point error comes from the environmental pollution index strange values, getting beyond the values that Vensim can handle. There must be some wrong equations formulations in your model. To understand them, put...
by LAUJJL
Tue Mar 19, 2024 4:42 pm
Forum: Vensim
Topic: publishing a model independently from its directory
Replies: 3
Views: 103

Re: publishing a model independently from its directory

I have tried again and now it works. I think i did not use correctly the Winrar tool when zipping the files.

Regards.

JJ
by LAUJJL
Mon Mar 18, 2024 4:40 pm
Forum: System Dynamics Discussion
Topic: Request of SD advice - Ph.D Thesis results
Replies: 5
Views: 226

Re: Request of SD advice - Ph.D Thesis results

Hi Sometimes but not always, Vensim if strict unit is not set, does not consider that adding a dimensionless variableor constant to a variable with dimension is not and error, guessing probably that the constant or variable without a dimension has the same dimension than the variable with a dimensio...
by LAUJJL
Mon Mar 18, 2024 10:12 am
Forum: System Dynamics Discussion
Topic: Request of SD advice - Ph.D Thesis results
Replies: 5
Views: 226

Re: Request of SD advice - Ph.D Thesis results

Hi

I would add: units with 'use strict testing' on, in the model settings.

Regards.

JJ
by LAUJJL
Mon Mar 18, 2024 9:36 am
Forum: Vensim
Topic: publishing a model independently from its directory
Replies: 3
Views: 103

Re: publishing a model independently from its directory

Hi Thank you for the reply; The .mdl and .vpmx model are in the c:\nouveau rent\Simple_135 repertory. i can open the .vpmx model with my computer but if someone tries to open the .vpmx sent via e-mail, and with a vensim reader Vensim says that he cannot find the c:\nouveau rent\Simple_135 repertory;...
by LAUJJL
Sun Mar 17, 2024 9:38 am
Forum: Vensim
Topic: publishing a model independently from its directory
Replies: 3
Views: 103

publishing a model independently from its directory

Hi When one publishes a model, the software gives a name to the model but associates too the repertory of the model published. if someone download the published model and wants to read it with the Vensim reader, he will be able to do it, only if the model is in the same directory than the model when...
by LAUJJL
Sat Mar 09, 2024 6:00 pm
Forum: System Dynamics Discussion
Topic: Vensim Models from Book
Replies: 4
Views: 152

Re: Vensim Models from Book

The book is copyrighted, but not the models that can be downloaded at: www.mhhe.com/sterman plus other information. It is written on the back cover of the book.

JJ
by LAUJJL
Fri Mar 08, 2024 9:56 am
Forum: System Dynamics Discussion
Topic: Vensim Models from Book
Replies: 4
Views: 152

Re: Vensim Models from Book

Hi

Zip model.

Regards.

JJ
by LAUJJL
Mon Mar 04, 2024 11:37 am
Forum: Vensim
Topic: publishing a model on a web server
Replies: 3
Views: 114

Re: publishing a model on a web server

Hi

Thank you for the answer.

Is there a plan in the future to make all the views displayed on the web server?

Best regards.

JJ
by LAUJJL
Sat Mar 02, 2024 10:33 am
Forum: Vensim
Topic: publishing a model on a web server
Replies: 3
Views: 114

publishing a model on a web server

Hi Ther are some limitations to publish a model on the web. It is sais in the documentation that: At present, only the active model view is published. What is the active model view? Does it mean that if you have ma model with multiple views, it cannot be totally published? Does it means that only mo...
by LAUJJL
Mon Jan 15, 2024 3:46 pm
Forum: Vensim
Topic: about a simple use of the new GUI
Replies: 2
Views: 1654

Re: about a simple use of the new GUI

Hi

Thank for your answer.

But I suppose that the user has a version of Vensim to open the model and run it?

What if he does not have one, like in the case of the old Venapps?

Regards;

JJ
by LAUJJL
Sat Jan 13, 2024 4:11 pm
Forum: Vensim
Topic: about a simple use of the new GUI
Replies: 2
Views: 1654

about a simple use of the new GUI

Hi Can somebody help me! I join a simplistic model and I want a user able to use it. i want the user to be able to change the value of the constant CONSTANT1, give a name to the new run simulating with the new value, and launch the simulation that will use the constant value and storing the results ...
by LAUJJL
Sat Jan 06, 2024 9:48 pm
Forum: Vensim
Topic: Multi-input Lookup
Replies: 13
Views: 23151

Re: Multi-input Lookup

Hi To really help, I need further explanation about your problem which is not clear in my mind. What are you trying to do? What is the purpose of the model. There is a pressure: is it continuous or discreet? Can you describe it? Is is constant through the time, is it choosen at the start of the simu...
by LAUJJL
Fri Jan 05, 2024 7:23 pm
Forum: Vensim
Topic: Multi-input Lookup
Replies: 13
Views: 23151

Re: Multi-input Lookup

Hi

I may be wrong but this looks like a two dimensionnal lookup. it is possible to build a two dim lookup with the vector lookup function. Look at the examples of Vensim model functions in users/public/vensim directory. joined.

JJ
by LAUJJL
Fri Jan 05, 2024 4:39 pm
Forum: Vensim
Topic: where is the sim set up from the old GUI in the new one?
Replies: 9
Views: 10765

Re: where is the sim set up from the old GUI in the new one?

Hi

I have not yet found the equivalent of the sim setup from the old GUI in the new one! Can anybody tell me where I can find it?
And It could be great if one could just have one model using all the new input objects from the new guide, so that one can see how they are used.

JJ
by LAUJJL
Sat Dec 30, 2023 2:28 pm
Forum: Vensim
Topic: where is the sim set up from the old GUI in the new one?
Replies: 9
Views: 10765

Re: where is the sim set up from the old GUI in the new one?

Hi

It could be great if one could just have one model using all the new input objects, so that one can see how they are used.
Regards.
JJ
by LAUJJL
Fri Dec 29, 2023 5:25 pm
Forum: Vensim
Topic: where is the sim set up from the old GUI in the new one?
Replies: 9
Views: 10765

Re: where is the sim set up from the old GUI in the new one?

Hi

At the left of the run name i can only find the sim control that works approximately the same as the old GUI but no sim setup.

Regards.

JJ
by LAUJJL
Fri Dec 29, 2023 4:24 pm
Forum: Vensim
Topic: where is the sim set up from the old GUI in the new one?
Replies: 9
Views: 10765

Re: where is the sim set up from the old GUI in the new one?

And where it is along the top toolbar? Can you just tell me what i have to do to change the values of the constants and run a simulation with these new values with the new GUI?

Regards.
JJ
by LAUJJL
Fri Dec 29, 2023 3:36 pm
Forum: Vensim
Topic: where is the sim set up from the old GUI in the new one?
Replies: 9
Views: 10765

where is the sim set up from the old GUI in the new one?

Hi

In the old GUI, there is a button named 'sim setup' where you can change the constant's values before running a simulation. Where can you do this with the new GUI?

Regards.

JJ
by LAUJJL
Tue Dec 26, 2023 2:38 pm
Forum: Vensim
Topic: comments about the new GUI
Replies: 7
Views: 7806

Re: comments about the new GUI

Hi I have started to work with the Venapps, that is not very practical. I have decided to work again with the new GUI. I will eventually need some explanations about the new input output objects. I hope too that it will not take to long until the Vensim reader works with the new GUI even if it is on...
by LAUJJL
Fri Dec 15, 2023 7:52 pm
Forum: Vensim
Topic: writing text withe the Venapps tool
Replies: 2
Views: 4519

Re: writing text withe the Venapps tool

Hi I do not agree with you. You write: 'all you can really do is adding textonly for each line of the paragraph.' I do not know if you have read the two solutions that I have exposed: one is with a textonly for each line as you propose but the other one is with only one textonly for the whole text w...
by LAUJJL
Thu Dec 14, 2023 5:35 pm
Forum: Vensim
Topic: writing text withe the Venapps tool
Replies: 2
Views: 4519

writing text withe the Venapps tool

Hi I tried to write a very simple text with paragraphs. Being not able to copy the text on the textonly venapp control, i was obliged to suppress the paragraphs. Joined a word file with the text with the paragraphs and without paragraphs. After that to obtain a text with pargrpahs i have found two w...
by LAUJJL
Sat Dec 02, 2023 3:52 pm
Forum: Vensim
Topic: comments about the new GUI
Replies: 7
Views: 7806

Re: comments about the new GUI

Hi I have started to work with the new GUI and its new input output objects. But it may be possible for those who are used to the old Venapps, but for me it is just impossible. There is not the slightest explanation about how to use this new way of presentation: no examples and no explanation about ...
by LAUJJL
Sun Nov 26, 2023 12:31 pm
Forum: System Dynamics Discussion
Topic: Long-term hospital capacity planning model
Replies: 2
Views: 9199

Re: Long-term hospital capacity planning model

Hi I would start by building first a model for the short time that will use eventually queues, because once this model is built it will give insights for the longer time model. if may be possible later on to build a model for the short and long time included, but I have a doubt about it. It will be ...
by LAUJJL
Wed Nov 22, 2023 3:51 pm
Forum: Vensim
Topic: Population
Replies: 2
Views: 2827

Re: Population

Hi You have four classes of people: the children age less or equal to 15. parents between 16 and 45, older people between 45 and 65 and old people more than 65. There is a slight mistake in your model that will generate a mass balance error. In the maturing flow people who die are still maturing. Yo...