Ventana software support forum

The "used as a lookup but not defined" error generally occurs when you have the following syntax in a pair of equations: y = x(z) z = (a number, expression, or anything else that isn't a lookup) The usage of x() implies a lookup. If you intend multiplication, then you need y = x*z or y = ...

Dear friends in Vensim forum,thanks for your reading.My English is poor so I will try my best to explain my trouble .I am writing a paper about Dynamic evolutionary game recently.When I assign value to variable（Ex2），the equation is ok(picture 1.)，and I'm not use function of lookup ,however when I ch...

Dear friends in Vensim forum,I am sorry to disturb you again,my English is poor ,so I will try my best to explain my problem in my process of studying Vensim Ple，how can I change the form about axis Y in graph 1 to the form about axis Y in graph 2，in other words，how to change the form of “....B” abo...

Dear two reply persons，thank you for your help about setting function ，my problem about smooth had been solved，the model is ok.I can not believe that when I first time seek to help in this forum，someone reply me so quickly，and I feel heart-warming.Thanks again！

hello everyone in vensim forum ，glad to see you！my English is a little poor，I will try my best to express my trouble. in my process of studying Vensim，I want to use smooth1 variable in a equation,but some error grow up----"unable to understand the right hand side of this equation".if I do ...