Ventana software support forum

Hi

After the compilation fails, Vensim says 'failed to compile the model (does not exist)'.

the other warnings are in the echos of the command file I joined.

Hi

I have verified again the paths asked in the batch file. Evenrything is OK and the VsDevCmd.bat file exists.
the only thing that I cannot verify is the '-arch=amd64' at the end of the call. i do not know what it means.

Regards.
JJ

I suppose that the directory is where the messages are sent to.

Hi Tom Thank you for your reply. I put the echo on in the batch file and this is the answer. Compiling Vensim model ... C:\nouveau rent\Simple_135>REM Comment out the ECHO statement if you need more information for debugging paths. C:\nouveau rent\Simple_135>REM C:\nouveau rent\Simple_135>REM First ...

Hi

Is it possible to switch the sketch to the oldest presentation that was in used some years before and used less place, allowing more place for the model equations?

Hi

Is it possible to switch the sketch to the oldest presentation that was in used some years before and used less place, allowing more place for the model equations?

I cannot past the entire mdlde64. It sayt Error 446.
i sent it to vensim@vensim.com

Hi My computer crushed and I had to reinstall Windows 10 and all my applications; i downloaded the latest DSS version and installed it. i installed too a new version of the 21019 C++ compiler (Visual studio 2019). When i ask to compile it tells me that the compilation failed and that i have to check...

Hi A better version 6 that adds the calculation of the resting time in the elevator, especially if the starting time of the rest is close to the end of the climbing the elevator. It renames too most of the auxiliaries to initials, which is clearer. It calculates as initial the total time spent, show...

the run is joined

HI
Here is th model joined.
if somebody does not understand it, just ask.
I could not upload the published model?
i download the .mdl


JJ

A slight change in both models, to avoid an unit errors in the mortality 0 to 14 using the stricte unit error.
JJ

the population model is very approximative and does not resist to extreme conditions tests. For example, if the births are set to constant 0 with the synthesim starting at year 1900 and the final time set to 2200. 8 % of the initial population is still in life 200 years later. It comes from the fact...

HI
In Vensim, the deaths arrow is going outward and not inward and the loop is still balancing like in your CD.

joined a simplistic population model. You can vary with the sysnthesim the average lifetime and the average fertility or the initial population and see what happens. JJ

Hi The deaths loop is a balancing loop and the births one is a reinforcing loop. Balancing loops do not necessarily need a goal. If the population is increasing the births are increasing as the deaths do, but births are added and deaths are subtracted to the population and this makes the difference ...

Hi
Can you post a vensim model that can be run, to illustrate your ideas with concrete runs. Regards. JJ

Hi

I have uploaded some corrections from the models included in a topic of the discuss forum of the system dynamics society web site started by Jack Jarich. I choosed to upload these two Vensim models here not being able to upload them in the discuss forum.
Best regards.
JJ

Yes, you have to make the connections by yourself between the main model and the submodels and it will then work. JJ

One of the main interests (at least for me) is to split a big model into smaller ones to make it easier to test them. Unfortunately, you can only test the sub-models mathematically, testing that there is no equation error. The problem comes from the necessity to find a value for some variables that ...

Is it possible to have multiple levels of sub models?

Hi When i set a constant as unchangeable it is just not to change it and not that it appears as changeable when setting the run. So i know that a unchangeable constant cannot be changed and I do not want to change it in any circumastances. in my model joined there is constant named const and set as ...

Hi the problem was already occuring with 9.0 DSS version. I downloaded the latest version and the problem is still there; I join a simplistic model with one unchangeable constant and its associated .cin file. whe one runs the model an error is reported. This happens with any model with unchangeable ...

Is it possible with the Vensim 9 version to keep the old user interface?

it is still not possible to erase multiple runs together and one must do it one by one with the latest DSS release. JJ