Ventana software support forum

Hello,
I'd like to try the new options RPARALLEL/XPARALLEL in v.10 but they are not available in Multiple start menu, please see the picture. Where to find these options?

Thanks

Thanks! That concludes my question. I'm sure many users will be grateful to you. Even though your post makes my explanation meaningless, I'm posting it. ==== I will try to formulate my question better (please be lenient, English is a foreign language to me). We have some dynamic system on which a co...

Hello, I would like to state that my model is functioning correctly and successfully reproduces the example specified in the reference webpage. Units are not mandatory. On the contrary, only the inexperienced use the units. For the rest, the SI base units (kg, m, s, A, K, mol, cd) are sufficient to ...

Dear JJ, For now, I am interested in this field for educational purposes only. I'm hoping to get more in-depth information about the optimization, as the Vensim help isn't helping me enough.

tomfid wrote: ↑Sun Jun 25, 2023 5:28 pm Maybe the VECTOR LOOKUP function? https://www.vensim.com/documentation/fn ... ookup.html

Maybe, but I'm not sure how to apply it in this case. Аny more detailed hint?

Dear Admins and Users, I reproduced in Vensim the Bang-Bang Control Problem, described here: https://excel-works.com/manual/ocpex1 The optimization results are quite close to the reference. I would like to define in a more efficient manner the control efforts ui at time points (ui,ti), but not as in...

Hello,
the custom graphs are not exported using the svg option - the result is just a grey rectangle. I know you are working on the graphics issues, but I am posting this in case you are not aware.

Thanks for the answer. I don't see any possibility to extend my optimization window down! Please see the attached picture of my screen - this is the minimum window size. It can only be pulled down about 10mm until it touches the taskbar. In both sections of the optimization window there are empty sp...

Hello! After working with Vensim's optimization module for some time I have a few suggestions for organizing the optimization window. 1. Please, from the Optimization Control Setup window, separate the Parameters section into a separate window. Now the parameters are always at the bottom of the scre...

Please, any detailed optimization tutorial written from humans to humans?

Any chance to enrich the options for the lines in the graph - thickness, color, pattern, font and size for axes?

Thank you very much!

Hello!
How to save the sensitivity graph?

Although the use of Vensim is not typical for engineering, it is very suitable for simulation of different engineering systems, mainly because of the presence of the very stable RK4auto, without mentioning the convenient modeling environment. It will not be a bad thing to have this capability in Ven...

Hello!
As I understand, the Euler method is used for the integration. I wonder if more sophisticated methods will be implemented?

Sorry, I have to check this. Thank you very much for your assistance.

I sent it again!
Thank you

Yesterday I already sent an email. If you have not received it, please tell me.
Kind regards

Hello!
I have tried to download Vensim PLE+ 7.1 few times because of very slow download speed and received a message: "maximum number of download times is reached". Now I don't have a possibility to download the software. Please, tell me what to do?

Kind regards
Rosen MITREV, TU-Sofia

Thank you very much!

Hello! I'd like to perform a sensitivity analysis, but I get the following error - "the variable is wrong type, must be constant" (the constant is beta in the attached model). Any trials to change the type of beta from auxiliary to constant are unsuccessful. What to do? Another issue- alth...

Ok, thank you!

It is a star moving in gravitational field of the galaxy:)

Hello!
I have noticed that if in the graph line width is set to 1, then all is OK. But if line width is 2, the performance is very bad. In the case of more points I need to restart the computer. Please, see the attached file.
Is this a bug or is normal behaviour> Vensim PLE, last version.

Ok, thanks