Search found 10 matches

by Danny
Fri Jul 10, 2009 7:26 am
Forum: Vensim
Topic: Stat dist
Replies: 3
Views: 3633

I wanted to use the suggested formula but I always get a floating point error.
What can be the reason?

Thanks, Danny
by Danny
Mon Aug 04, 2008 1:43 pm
Forum: Vensim
Topic: logical operators
Replies: 2
Views: 2731

Thank you. Of course it works now.
Sorry for that stupid question, but I've just gone blank with this problem.

Thanks for the help,
Danny
by Danny
Mon Aug 04, 2008 11:55 am
Forum: Vensim
Topic: logical operators
Replies: 2
Views: 2731

logical operators

I have a problem with an IF THEN ELSE function. The function is the following: measure= IF THEN ELSE (threshold1>=value1 :OR: threshold2>=value2 :OR: threshold3>=value3, 100, 0) There is a problem with the logical operators. I want to express that, if one or more of the thresholds are reached or exc...
by Danny
Thu Jul 03, 2008 7:27 am
Forum: Vensim
Topic: Simultaneous loop error
Replies: 6
Views: 8548

Thank you Tony,
I suppose this is my problem. I will try to find another solution than SIMULTANEOUS.

Danny
by Danny
Wed Jul 02, 2008 2:38 pm
Forum: Vensim
Topic: Simultaneous loop error
Replies: 6
Views: 8548

Simultaneous loop error

Dear Forum member,

My model gives me the following error: Unable to converge simultaneous loop at time …
What does it mean? It is not all the time, only for some time steps.
Please help me.

Thanks, Danny
by Danny
Fri May 09, 2008 7:26 am
Forum: Vensim
Topic: Maximum value
Replies: 9
Views: 8472

This works!
Exept for that other problem, of course. But I can fix that.

Thank you very much,
Danny
by Danny
Thu May 08, 2008 3:28 pm
Forum: Vensim
Topic: Maximum value
Replies: 9
Views: 8472

ok, no problem.

Thanks in advance
by Danny
Thu May 08, 2008 2:19 pm
Forum: Vensim
Topic: Maximum value
Replies: 9
Views: 8472

Hello, Sorry for my late response, but there were other urgent issues waiting on my desk. I think the optimization or the FIND ZERO do not work for me. I try to explain the problem differently: The parameter FW(%) (0 to 100 %) is the problem. It is used to calculate a set of parameters which then re...
by Danny
Wed Apr 30, 2008 8:51 am
Forum: Vensim
Topic: Maximum value
Replies: 9
Views: 8472

Thanks a lot.
I will check that out immediately...

Thanks for the quick reply!
Danny
by Danny
Wed Apr 30, 2008 7:05 am
Forum: Vensim
Topic: Maximum value
Replies: 9
Views: 8472

Maximum value

Hello everyone, I have a problem with one of the parameters in a Vensim model (I use Vensim DSS). I want to express the following: First the variable x is used in different equations (it should take every integer from 0 to 100), then the term “earnings minus losses” (both variables are dependent fro...