Search found 1428 matches
- Sun May 12, 2024 4:02 pm
- Forum: Vensim
- Topic: System Dynamics definition
- Replies: 5
- Views: 58
Re: System Dynamics definition
Hi 'everybody' I have never been bothered by stocks or levels or flow or rates. Anyhow, whatever word you use, it will be understood differently by people. Using two different names for the same thing is not necessary a bad idea. For some people a rate is more suggesting than a flow, same for stocks...
- Sun Apr 21, 2024 9:03 am
- Forum: Vensim
- Topic: Death by Subscript
- Replies: 6
- Views: 375
Re: Death by Subscript
do the errors disappear if you suppress the sum function in the model, and is the ground function calculated? In that case the ground function does not look like depending on the subscript n and you should replace the sum function by ground function * elmcount'n). the answer to your question is in t...
- Sun Apr 14, 2024 8:33 am
- Forum: Vensim
- Topic: downloading 32 or 64 bit Python version for web publishing
- Replies: 4
- Views: 401
Re: downloading 32 or 64 bit Python version for web publishing
But the message is at the end the HTML file. Maybe if the message is written, it means that the test is positive? But it should logically return to the prompt?
- Fri Apr 12, 2024 7:50 pm
- Forum: Vensim
- Topic: downloading 32 or 64 bit Python version for web publishing
- Replies: 4
- Views: 401
Re: downloading 32 or 64 bit Python version for web publishing
I have downloade the 32 bit version and it works ok.
All the web files are there.
But if I run the webserver python file it writes 'port 8080' and stops there?
Regards.
JJ
All the web files are there.
But if I run the webserver python file it writes 'port 8080' and stops there?
Regards.
JJ
- Fri Apr 12, 2024 4:34 pm
- Forum: Vensim
- Topic: downloading 32 or 64 bit Python version for web publishing
- Replies: 4
- Views: 401
Re: downloading 32 or 64 bit Python version for web publishing
But when I load the 64 bit versions it does not ask me to tick the path button.
- Fri Apr 12, 2024 3:16 pm
- Forum: Vensim
- Topic: downloading 32 or 64 bit Python version for web publishing
- Replies: 4
- Views: 401
downloading 32 or 64 bit Python version for web publishing
Hi.
I want to pulish a model on the web.
in the documentation about downloading python there is only the 32 bit version mentioned. But one must download the 32 or 64 bit python installer?
Best regards.
JJ
I want to pulish a model on the web.
in the documentation about downloading python there is only the 32 bit version mentioned. But one must download the 32 or 64 bit python installer?
Best regards.
JJ
- Mon Apr 01, 2024 2:37 pm
- Forum: Vensim
- Topic: two imodels with no significant differences behaving differently
- Replies: 2
- Views: 386
Re: two imodels with no significant differences behaving differently
Hi Tom
i have found the error. The new GUI is quite different than the previous one with constant changes. One model takes its change from a previous run;
Thank you;
JJ
i have found the error. The new GUI is quite different than the previous one with constant changes. One model takes its change from a previous run;
Thank you;
JJ
- Mon Apr 01, 2024 2:15 pm
- Forum: Vensim
- Topic: two imodels with no significant differences behaving differently
- Replies: 2
- Views: 386
two imodels with no significant differences behaving differently
Hi Joined two very simplistic models that are similar but generate different results. the problem comes from the lookup table. if you campare the lookups in both models they are the same in the equation tool, and in their graph. Bu it you look at the values of the lookups in the table tool they are ...
- Sat Mar 23, 2024 3:08 pm
- Forum: Vensim
- Topic: Floating Point Error
- Replies: 3
- Views: 1742
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...
- Tue Mar 19, 2024 4:42 pm
- Forum: Vensim
- Topic: publishing a model independently from its directory
- Replies: 3
- Views: 1643
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
Regards.
JJ
- Mon Mar 18, 2024 4:40 pm
- Forum: System Dynamics Discussion
- Topic: Request of SD advice - Ph.D Thesis results
- Replies: 5
- Views: 1860
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...
- Mon Mar 18, 2024 10:12 am
- Forum: System Dynamics Discussion
- Topic: Request of SD advice - Ph.D Thesis results
- Replies: 5
- Views: 1860
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
I would add: units with 'use strict testing' on, in the model settings.
Regards.
JJ
- Mon Mar 18, 2024 9:36 am
- Forum: Vensim
- Topic: publishing a model independently from its directory
- Replies: 3
- Views: 1643
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;...
- Sun Mar 17, 2024 9:38 am
- Forum: Vensim
- Topic: publishing a model independently from its directory
- Replies: 3
- Views: 1643
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...
- Sat Mar 09, 2024 6:00 pm
- Forum: System Dynamics Discussion
- Topic: Vensim Models from Book
- Replies: 2
- Views: 1600
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
JJ
- Mon Mar 04, 2024 11:37 am
- Forum: Vensim
- Topic: publishing a model on a web server
- Replies: 3
- Views: 1339
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
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
- Sat Mar 02, 2024 10:33 am
- Forum: Vensim
- Topic: publishing a model on a web server
- Replies: 3
- Views: 1339
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...
- Mon Jan 15, 2024 3:46 pm
- Forum: Vensim
- Topic: about a simple use of the new GUI
- Replies: 2
- Views: 2839
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
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
- Sat Jan 13, 2024 4:11 pm
- Forum: Vensim
- Topic: about a simple use of the new GUI
- Replies: 2
- Views: 2839
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 ...
- Sat Jan 06, 2024 9:48 pm
- Forum: Vensim
- Topic: Multi-input Lookup
- Replies: 13
- Views: 35353
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...
- Fri Jan 05, 2024 7:23 pm
- Forum: Vensim
- Topic: Multi-input Lookup
- Replies: 13
- Views: 35353
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
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
- 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: 20125
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
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
- 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: 20125
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
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
- 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: 20125
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
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
- 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: 20125
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
Regards.
JJ