Ventana software support forum

Over the next few weeks, I will be changing the software for the forum.

Currently we use XMB, and have decided to move to phpBB because of the extra functionality it will give us. All posts and attachments will be migrated to the new board.

Feel free to make any comments about the change.

Tony.

Do you need morale modelled as a stock?

It sounds as if you already have a lookup that relates perks to morale (ie, perks = 100, morale = 10 and perks = 200, morale = 20), so just use that to calculate a morale level.

How are you trying to use the lookup?

If the lookup X axis was time, you could have something like

product flow = normal product flow * lookup table ( time )

It seems to be a forum software problem. I'm looking into it.

Tony.

I've opened a support ticket with our ISP, hopefully it will get fixed soon.

Tony.

I've tried again.

I've added the mime type for mdl. Let me know if it downloads ok now.

Tony.

I can download the model fine, but it is just a diagram, none of the parameters have any equations.

JJ, try renaming the downloaded file as model.mdl, hopefully it will then open up for you.

Tony.

Usually you use a baseline for comparison purposes. For example, your model may show what happens if you make no changes to any constants. This would be the baseline. Now run again but changing input constants, these can then be compared to the baseline to see what changes have resulted in the chang...

You'll have to search Google for Excel number formatting.

There is a summary table at the following link that lists the differences.

http://www.vensim.com/comparison.html

PLE is free for personal use, so you can download it and have a go to see what you will be missing.

Tony.

There is a tool that ships with Visual Studio called dependency checker. If you copy this to the Windows 7 machine, and then open the DLL in dependency checker, it will list what additional DLLs are required by your VENSIM.DLL.

I suspect it may depend on other DLLs that are not on Windows 7.

Tony.

It might be an idea to break your questions up into smaller chunks (and post the model here as well so we have something to look at).

Tony.

Are you sure the path to the DLL is correct?

Open up the Vensim help system, and click on the Reference Manual. Chapter 9 deals with getting data into your model (there is a section dedicated to "Tab delimited and spreadsheet data"). You can store the data in tab files (but need to import them to .VDF type files), or just link to the...

I'm not sure you are doing things correctly here. Your users need the Vensim Model Reader installed purely to supply VenDLL32.dll. You need to give the user the .jar file and the .vpa. The user opens the .jar file, which in turn opens the .vpa. Do not package the .jar within the .vpa. Have a go at t...

There should also be a .OUT file. Try using that as a CIN file.

I don't have easy access to a version that goes back as far as 5.5d.

Are you able to update at all to a later version (http://www.vensim.com/download.html)?

What version of Vensim do you have installed and I'll try to re-create the error here.

Tony.

Has Matlab been upgraded on the computer you are working on?

Do you mean Vensim PLE?

If yes, you cannot do it. You will need Vensim DSS.

Only you will know if the model has an error.

Can "fraction of fertiliser" be larger than 1?

I cannot see any problems with this model. Can you give me a list of values for "LARGE NUMBER" to try? Or describe the exact steps to see the behaviour you are seeing?

Apart from some small rounding errors, the allocation is identical to the input as well.

Have a look at the values "fraction of fertiliser" takes. If it's greater than 1, then that's where the warning is coming from.

Have a look at the x bounds on your lookup, and see if the value you are looking up falls outside this.