Search found 4585 matches

by Administrator
Wed Apr 06, 2011 9:25 am
Forum: Vensim
Topic: I need help in venapp
Replies: 2
Views: 2267

Re: I need help in venapp

Have you loaded a model in the venapp (SPECIAL>LOADMODEL)?
by Administrator
Wed Apr 06, 2011 8:12 am
Forum: System Dynamics Discussion
Topic: System dynamics simulation with non-SD software
Replies: 4
Views: 5356

Re: System dynamics simulation with non-SD software

Most users on here will be using Vensim (so the question of "any pitfalls in using non SD software" will not be one they face). If the results are correct and you know your model is dimensionally correct, I cannot see any reason why you shouldn't use something else. It's straightforward to...
by Administrator
Mon Apr 04, 2011 3:11 pm
Forum: System Dynamics Discussion
Topic: Help needed with Forrester's urban model
Replies: 4
Views: 4643

Re: Help needed with Forrester's urban model

There is lots of help available, but you need to ask more specific questions.

What parts of the model do you need help with?
by Administrator
Mon Mar 28, 2011 5:53 pm
Forum: Vensim
Topic: Directory for VDF File
Replies: 2
Views: 2226

Re: Directory for VDF File

Use SIMULATE>RUNNAME|full_filename to do this.
by Administrator
Mon Mar 28, 2011 7:20 am
Forum: Vensim
Topic: Adding Variables to a View
Replies: 5
Views: 3331

Re: Adding Variables to a View

I need to make the stocks in my model with limited capacity? is there any way to to have max accepted value for the stock?? I searched the help menu and did not get any thing There is no automatic way. Create an auxiliary variable called "MAX STOCK LEVEL". Then make sure your resupply rat...
by Administrator
Fri Mar 25, 2011 7:36 pm
Forum: Vensim
Topic: Help! (Cannot View Equation Editor Window)
Replies: 24
Views: 12011

Re: Help! (Cannot View Equation Editor Window)

Did PLE ever work properly for you on the Mac?

I'm sure there must be something interfering with Vensim, but I don't know what it is.
by Administrator
Tue Mar 22, 2011 8:00 pm
Forum: Vensim
Topic: Help! (Cannot View Equation Editor Window)
Replies: 24
Views: 12011

Re: Help! (Cannot View Equation Editor Window)

Is it Livescribe desktop you have installed?

What happens if you disable it?
by Administrator
Tue Mar 22, 2011 2:18 pm
Forum: Vensim
Topic: Broken and Inconsistent Graph Curves
Replies: 7
Views: 4403

Re: Broken and Inconsistent Graph Curves

Can you upload the model so we can try and reproduce the error?

Or email it to us (vensim@vensim.com)?

Tony.
by Administrator
Tue Mar 22, 2011 12:43 pm
Forum: System Dynamics Discussion
Topic: Delay
Replies: 5
Views: 6149

Re: Delay

You will need to ask on a forum dedicated to Stella (unless someone on here can advise).

Tony.
by Administrator
Tue Mar 22, 2011 12:42 pm
Forum: Vensim
Topic: Help! (Cannot View Equation Editor Window)
Replies: 24
Views: 12011

Re: Help! (Cannot View Equation Editor Window)

Thanks Ulli, unfortunately that file is identical to the one I already have on my Mac (so we are no further towards solving the problem).

What other software do you have installed?
by Administrator
Tue Mar 22, 2011 10:02 am
Forum: Vensim
Topic: Help! (Cannot View Equation Editor Window)
Replies: 24
Views: 12011

Re: Help! (Cannot View Equation Editor Window)

There is still a vensim.ini for the Mac version. Go to where you installed Vensim, right click on the Vensim icon and select "Show Package Contents". Double click on "Contents", then "MacOS" and vensim.ini is in there. Can you email that file to me please (vensim@vensim...
by Administrator
Mon Mar 21, 2011 12:46 pm
Forum: Vensim
Topic: Help! (Cannot View Equation Editor Window)
Replies: 24
Views: 12011

Re: Help! (Cannot View Equation Editor Window)

I'm not as up to speed using Macs as most people. Is there a similar mode to the Windows safe mode that you could try Vensim in to rule out other applications interfering with Vensim?
by Administrator
Sun Mar 20, 2011 8:18 pm
Forum: Vensim
Topic: Help! (Cannot View Equation Editor Window)
Replies: 24
Views: 12011

Re: Help! (Cannot View Equation Editor Window)

Can you click VensimPLE->About and tell me the version number?

I cannot re-create the error on my Mac here.

Tony.
by Administrator
Sun Mar 20, 2011 6:00 pm
Forum: Vensim
Topic: Help! (Cannot View Equation Editor Window)
Replies: 24
Views: 12011

Re: Help! (Cannot View Equation Editor Window)

Can you go back to using version 5.10D?
by Administrator
Fri Mar 18, 2011 6:36 pm
Forum: Vensim
Topic: Vensim (DDE) + Python
Replies: 12
Views: 11167

Re: Vensim (DDE) + Python

Tom is right. It could be that Vensim is stopping at the space so is trying to run
"[SPECIAL>LOADMODEL|C:\Program]"
by Administrator
Fri Mar 18, 2011 2:43 pm
Forum: Vensim
Topic: Vensim (DDE) + Python
Replies: 12
Views: 11167

Re: Vensim (DDE) + Python

Another question. Is Python similar to C where you need double \\?

What happens if you try
comando = "[SPECIAL>LOADMODEL|C:\\Program Files\\Vensim\\models\\sample\\EXTRA\\ball.mdl]"
c.Exec(comando)
by Administrator
Fri Mar 18, 2011 2:06 pm
Forum: Vensim
Topic: Vensim (DDE) + Python
Replies: 12
Views: 11167

Re: Vensim (DDE) + Python

Does "c.Exec(comando)" return a value? If yes, what is the value of nResult below?

nResult = c.Exec(comando)
by Administrator
Fri Mar 18, 2011 1:28 pm
Forum: Vensim
Topic: Vensim (DDE) + Python
Replies: 12
Views: 11167

Re: Vensim (DDE) + Python

And what error message are you getting on "c.Exec(comando)" line?
by Administrator
Wed Mar 16, 2011 6:29 pm
Forum: Vensim
Topic: Vensim (DDE) + Python
Replies: 12
Views: 11167

Re: Vensim (DDE) + Python

Can you post anything for us to take a look at?
by Administrator
Wed Mar 16, 2011 4:41 pm
Forum: System Dynamics Discussion
Topic: A quick question
Replies: 1
Views: 2927

Re: A quick question

The amount you remove from the level is
level / time step.

If you have a 0/1 switch that tells you when the year is starting, just multiply it by level / time step and remove it from the level.

Tony.
by Administrator
Tue Mar 15, 2011 7:34 am
Forum: Vensim
Topic: Integration method used in Vensim
Replies: 1
Views: 1714

Re: Integration method used in Vensim

Click "Model->Simulate" and all the information you need is on the dialog that pop up.

Tony.
by Administrator
Mon Mar 14, 2011 6:32 pm
Forum: Vensim
Topic: Compiled simulation in Mac OS X -- missing simext.c
Replies: 5
Views: 3133

Re: Compiled simulation in Mac OS X -- missing simext.c

I've emailed you regarding this.

Tony.
by Administrator
Mon Mar 14, 2011 5:29 pm
Forum: Vensim
Topic: Compiled simulation in Mac OS X -- missing simext.c
Replies: 5
Views: 3133

Re: Compiled simulation in Mac OS X -- missing simext.c

That's what I mean. I've got XCode installed and running now so should have an answer for you shortly.

Tony.
by Administrator
Mon Mar 14, 2011 3:16 pm
Forum: Vensim
Topic: Compiled simulation in Mac OS X -- missing simext.c
Replies: 5
Views: 3133

Re: Compiled simulation in Mac OS X -- missing simext.c

Are you using the GCC compiler? Or XCode?
by Administrator
Mon Mar 14, 2011 12:00 pm
Forum: Sable
Topic: sable runtime
Replies: 1
Views: 3867

Re: sable runtime

Can you email me at tony@ventanasystems.co.uk? I received nothing at vensim@vensim.com.

Tony.