Ventana software support forum

Do you have a managed PC? It could be that the files that need to be written to the windows system directory might not have been installed (this would cause problems). I have uploaded a replacement installation that avoids this. Can ou try downloading again? The direct link is http://www.ventanasyst...

Colours of plots themselves will change as the graphs are dynamic. Formatting things like background colours, legend placement will be unaffected.

Tony.

What kind of changes are you making? Certain things are overwritten (like axis labels).

Tony.

I will see if I can find an upgrade to the forum software.

Tony.

You can try command scripts
http://www.vensim.com/documentation/html/25670.htm

Not sure if they work in PLE Plus though.

Maybe put the data in Excel, change there and run, that will be faster than editing an equation to change a data value.

Tony.

Tony.

[Edited on 8-8-2004 by Administrator]

Another tip, if you click Model->Settings->Info from the Vensim menu, there is a button for Model->CIN, click this and it will give you a template CIN file that you can edit in the Vensim text editor. Select the particular lookup you are interested in and there is a graph button in the text editor. ...

The best thing to do would be to enter the data into a CIN file (see the help system under changes file or just CIN). Basically you can use Vensim's text editor to edit and create lookup tables. You then use this CIN file when running a model instead of holding the data in the model itself. Hope thi...

>> I used this to block the input to the
>> part when not in use. In my case no
>> input meant no output.
Thats what I always do as well. I cannot think of a better solution.

Tony.

In this case there were some 'funny' characters in the model file, once these were removed all was fine.

It could have been that the saving of the model resulted in a corrupt file, not sure yet.

Tony.

Hi Brendan,

Can you email the model to me (tony@ventanasystems.co.uk) and I will take a look?

Tony.

Have you tried simulating for a shorter time period, or modify SAVEPER to be a larger amount? That would require less memory and might work for you.

Tony.

The error is just a problem of memory allocatation, so it does not tell much about the actual cause of the problem. >> The input variable i have changed is a >> matrix: I changed its dimension from >> [10,365,4] to [10,365,24] so i don't >> think that it has become too "heavy" >> for the p...

Can you post the model you are having trouble with?

Tony.

Custom allocation I always do in an external function (you have complete control then about what you allocate where). Just be careful to not use array external functions when you pass in a subrange. Are the Vensim allocation routines any use? A side note (in case it helps) regarding the following. >...

You can do loops in Vensim fairly easily, the following should do what you gave as an example. manageArray[a-sub] = sum ( if then else ( Array ID[a-sub!] = arbitrary-a-subscript , adjValue , 0 ) ) Array ID[a-sub] = a-sub The sum loops over all elements in the array, and only takes the value where a-...

Just so we can see the contents of the Word document on the forum, here it is. Comment on Vensim; How come users do not have arbitrary access/manipulation/control of subscripts ? the following psuedo code hopefully makes the point: MACRO: manageArray( array[a], arbitrary-a-subscript, adjValue ) For ...

I think you need to use the merge tool in Vensim, and drag the stock over the cloud.

Is this what you are trying to do?

Tony.

There was a bug in 5.1 Vensim DLL (I think) where the hammer could not be turned off. Can you update your installation to 5.3 (it definetly works fine here).

Tony.

I cannot reproduce the error here (but I am using 5.3).

When did you buy your licence, you might be able to get a free upgrade, visit http://www.vensim.com/download.html.

Tony.

I think I was confused myself. I was thinking more of a conveyor than a queue.

As long as you are back on track thats the main thing.

Tony.

Hi, I have a limited understanding of queues (it has been some time since I studied them), but the average age should reach a plateau shouldn't it? If my queue is 10 months, the average age can never go above 10 months no matter how many widgets I have in the system. Does this help in any way? Tony.

Hi,

Sorry about the delay in replying (I missed the post).

Can you post a sample model that is causing the warning? I might be able to give you some advice if I can reproduce the error.

Tony.

Create a new auxiliary that uses DELAY FIXED with the delay time = time step (this will give you A(t-1)). Then use an IF THEN ELSE statement.

Hope this helps,

Tony.

Someone else did try this and failed. Using the Vensim DLL from Excel will not work, it would be trying to create a DDE link to itself as Excel would be the host application.

Tony

Here is the excel file.