Ventana software support forum

Hi
It might be better to use the strict unit testing. If you use the strict unit testing two more errors will appear in both models. But I do not think that these errors have anything to do with your problem.
JJ

HI The COIN model discussed years ago in the SDS forum when it was still active, is for me a good example of an impressive model, that has no chance of ever being useful to anything or anybody except its author. Exposing the reasons would take me a time that I am no more ready to spend, because my e...

Hi Help yourself and heaven will help you. I took a look at your model. Several remarks. First there are no units in you model: a sign of a complete beginner in Vensim. Set the stricte unit testing on in the units equivalent window. Correct units is mandatory. Secondly! You should simplifiy your mod...

Hi Are you a researcher or are you working wth optimal control problems applied to real problems with planned implementation? In the second case, i use mainly dynamic programming methods (ref Bertsekas from MIT) and Vensim is very well adapted. If you are working on real cases to be implemented, we ...

Hi Tom Every time that a file is missing, one has to erase the folrmula with the get vdf and replace with :NA: or anything else, run the model to get the run and then get the get vdf formula back with the name of the run generated. This is cumbersome. What is the purpose of the actual design? it wou...

Hi

joined a model using get vdf data that generates an error if one uses an empty file. same is one uses the get vdf constants function.

Regards.

JJ

i think that the .ini file becomes big with the sim subscript put to 100000 and it first says that it cannot open it and then still opens it but it takes more time;

JJ

i have erase the get vdf variable. the downloading time stays the same with the sim subscript put to 100000.

JJ

I thinkthat it has to do with the subscript sim that is very large 100000. When i put it to 1000, it loads quickly again.

But the need to use the options stays.

JJ

Whatever the situation it loads in about 15 seconds.

i join another model that is much more complex and downloads excel data that loads instantaneoulsly in 0.1 second.

JJ

Hi

It loads from 10 to 20 seconds.

But before that the load was instanttaneous, in 0.1 second.

JJ

Hi
thank you for answering.
I use the 9.3.5 vensim DSS. i think it is the last version.
i use the old guy.
the model is joined.
Regards.
JJ

Hi i like generally when starting Vensim to automatically load the model i was last working on. this dos not work anymore. To avokd that pitfall, when i finsh to work I go to the options general and chek off and in the l'oad the last model worked on'. When i do that it works fine. but it takes a lon...

Hi Jeff

Thank you for your explanation. Working alone, I do not have to manage different people simultaneously modifying a source code that has some advantages and some drawbacks too.
Anyhow good luck for your project

Regards.

JJ

Hi The display code is not viewable in the flowchart view, but if I right clkck on a variable of the view, you can view the entire display code of the variable and can change it, something that I often do; i never change anything in the text model below the warnings Sketch information etc.. What is ...

I will look at yout post to-morrow. Too late for me to think. Good day.

JJ

Hi Jeff The display code appears in the flowchart view if you click on a variable; you can modfy it ; it appears too in the model as text at the end of the list. It cannot be modified. Do you agree? What do you name a sheet? Is it what Vensim names a view? Or is it what appears when you clck on a va...

Hi

I do not understand what you mean by display code inside a model. Is it a Venapp code or a script code? Can you give a simplistic model example illustrating a model with display code inside?

Regards.

JJ

Hi i never use the vector elm map function. It is dangerous with the risk of getting values outside the range of the array, and because of its complex formuoation if used with muliple subscripts that generates errors. if i want to get the value of say the element of a one dimension vector vector[sub...

Hi

It is possible too, to use the vector lookup to build a two dimensional lookup see the function example. it was maybe not possible to do that years ago and the solution at this time was more complex. It must be too possible to build a three dimensional lookup using the vector lookup.

JJ

Hi When two variables have both an effect on another variables and these effects are independant from one another, the total effect is equal to the multiplication of both effects. But if the effects are not independant from one another then you must build a two dimension lookup. There was in the pas...

Hi

Joined three workarounds that seem to work correctly. i prefer the test3 or the test4 that are safer. the test 2 works but i am not sure in all circumstances.

Best

JJ

Hi I have a model that behaves differently when one uses a simple simulation setting a parameter value with the set button, or is on uses the synthesim modifying the parameter value using its slider. I have included the model in vpmx format and two runs; the first run named current has the parameter...

Hi

I have found the 2019 version and now it works.

Thank you for your help.

JJ

Hi Thank you for your answer. I downloaded from your source and dwonloaded visual studio 2022, finding no 2019 version. Of course there are no files from the directories specified in the mdl;bat and of course it does not compile. When installing it did not ask me anything about c++ and no ticking wa...