Ventana software support forum

Thanks for the tip! You are right - from running the CMD file I saw that the .vsc and .lst files weren't being found so I included the full paths and replaced double back slashes with forward slashes. Everything seems to be working now.

I'm trying to run a series of sensitivity simulations with the Vensim DLL. I have defined sensitivty control files (.vsc) and save files (.lst) for each one. I am using the "SIMULATE>SENSITIVITY|vscfile" command to first set the control file to be used for the simulation, and then the &quo...

Awesome! I didn't expect the model to run yet anyhow. It was connected using a C-extension to a CGE based energy-economy model and ran into a lot of issues because of it. We're currently replacing that model with another one that I think you would be familiar with.

Thanks again,

Patrick

Yes it was runnable. I didn't mention this part but the equations weren't modified by Vensim after changing the subscript names. I had to open the .mdl file in a text editor to find and replace the subscript element names using a regex. The BIOGEOCHEM model runs from start to finish (had to make a s...

After renaming the subscripts i, j, and k to source, sink, and element (as well as their subscript elements), I pasted BIOGEOCHEM.mdl into Global_model.mdl (attached). After checking the subscript control window there doesn't seem to be any conflicts and the subscripts from the pasted model seem to ...

That is actually very helpful seeing these errors. I tried doing this (File>Edit file...) but Vensim crashes before I can get there. My guess is that I have to add in the subscripts that were used in the previous model before pasting it in? The attachment "BIOGEOCHEM.mdl" is the one that I...

Here is version information if needed as well:

Windows-10-10.0.17763-SP0
Vensim DSS for Windows Version 6.4c (x32)

I get this error when I try to open a particular model with Vensim. This only started happening after I copy and pasted in components from a separate model that I was working on in a different file. After trying to open the model and getting the error a few times in a row, I opened Vensim first and ...

I am trying to upload some time-dependent exogenous data into a model that consists of ~13k values. I started by creating an Auxilliary variable with sub-type of Lookup. When I press "As Graph" and import the values copied from a spreadsheet it appears they are uploaded successfully. Howev...

For some reason, when I try to publish a model by using File>Publish with the default settings (readable by all, settings included, and no additional files). The program exits and I am not able to publish the model. Do you have an idea of what the problem might be and/or how it can be resolved? I am...

How can I look at the intermediate states of Dynamic functions? For example if I have a DELAY_FIXED variable with a delay time of 10, how can the state of the 10 additional stocks used to represent the delay behaviour be obtained? I would like to view this with the "Table" tool if possible...

Sure thing - here is the mdl and vpm files for the model I was using to test.

I have been using vensim_get_state and vensim_set_state to resume a simulation from a previous run but I get the same output + 1 time step rather than one that is continued onwards from the state at the end of the first run. Here is a short example (attached) written using the DLL in Python. What en...

Every now and again I get the error in the subject headline when I am running a model with the Vensim DLL multiple time while keeping the same run name. Something like: vensim_command('SPECIAL>LOADMODEL|model.vpm') vnesim_command('SIMULATE>RUNNAME|Run1') vensim_command('MENU|RUN|O') vensim_get_data(...

Actually, somehow it's working now! I think I just had to restart Vensim another time manually. Thanks for all the help!

I tried both option 1 and 2 and have the same error as in the original post, "Not able to analyze model" in the status bar. Is there any other alternative?

I forget to mention that it does seem it would need to be re-compiled. I tried specifying dll in Tools->Options->Startup->External function library but it says "The external functions in ... cannot be loaded. Do you want to try again next time?". Clicked "Yes", Vensim restarts an...

So it turns out the external function library is using some other proprietary libraries that I can't get my hands on. Even if I did want to try and re-compile it is not an option. All I want to do is be able to see the model sketch! I'm planning on re-implementing the part that is used in the extern...

Good catch. I didn't realize the model was using external functions until now. I think the DLL containing the external functions was put together with files from an older version of Vensim. Does that mean it will need to be recompiled?

Thanks for the prompt reply.

I'm trying to open a model (created in 2011 if that helps) and the first thing that comes up is the text inside the mdl. So I go to View->As Sketch and then I get a dialog that pops up with "Syntax Error." which points to this statement: vensimOutput= WRITE(Tau1,Tau2,Tau3,b1 0,b2,b3,Pfz1,P...

I've done this on Windows. Not sure if it will work the same way on Linux but since you're using wine with the windows dll (I think?) then maybe take a look here: https://github.com/pbreach/venpy

i guess I'll get to work on my hacky solution...

I stumbled upon this link in the Vensim Help Docs: https://www.vensim.com/documentation/index.html?dll_venapp_and_command_changes.htm . I'm interesting in the following statement: DLL Contexts The Vensim DLL is now available in a configuration that allows for multiple context definitions. This is ve...

Thank you for your prompt reply. The code is working now! One last question though. Does the value set to GAMEINTERVAL represent the number of time steps or the length of time between giving control back to the user? I am thinking of the case where the TIME STEP != 1. I've been looking through the V...

I'm trying to use a combination of vensim_start_simulation, vensim_continue_simulation, vensim_finish_simulation if a loop for which the simulation is carried out bit by bit returning control to the user after a given number of time steps. The pseudo-code looks something like this: for i in 1:step:1...