Search found 6 matches

by mehdi_Asa
Sun Mar 25, 2012 2:51 pm
Forum: Vensim
Topic: What improvements would you like to see in Vensim?
Replies: 150
Views: 11193310

Re: What improvements would you like to see in Vensim?

I would like to see a more (particularly for beginners) user friendly reference mannual and help system. Some SD models can be used as tutorial vehicle and enormous aspects of devepment and simulation of SD models can be discussed in the manual's chapters step by step adding more information in each...
by mehdi_Asa
Sun Mar 25, 2012 11:49 am
Forum: Vensim
Topic: error messages related to lookups
Replies: 10
Views: 11054

Re: error messages related to lookups

Dear Administratr, Thank you for tour kind reply and information but it seems that I cannot explain my problem adequately. In my model I have an axiliary variable (Cdelta) consisting of several (4) lookups (called Ck11, Ck12, Ck21 and Ck22). The model is sent before and equations are 004 and the fol...
by mehdi_Asa
Sat Mar 24, 2012 7:41 pm
Forum: Vensim
Topic: error messages related to lookups
Replies: 10
Views: 11054

Re: error messages related to lookups

Thank you for your reply, I read Ch. 4 and 6 of the reference manual but still could not fixed the error. As I am a beginner working with Vensim I wonder if you could be kind enough to show me how a parameter can be passed to a lookup. In dynamo language I used to set an input variable to my table f...
by mehdi_Asa
Sat Mar 24, 2012 2:18 pm
Forum: Vensim
Topic: error messages related to lookups
Replies: 10
Views: 11054

Re: error messages related to lookups

The equation that causes an error mesage is equation No. 004
by mehdi_Asa
Fri Mar 23, 2012 3:50 pm
Forum: Vensim
Topic: error messages related to lookups
Replies: 10
Views: 11054

Re: error messages related to lookups

Dear Admin. Thank you very much for your reply. Please find below equations of my model. I have got message of error saying that CKij in equation 004 are lookups and cannot b e used as normal variables. I am looking for a remedy. Kind regards, Mehdi (001) BoP= (Or+GD+X-M)/ita Units: **undefined** (0...
by mehdi_Asa
Fri Mar 23, 2012 8:46 am
Forum: Vensim
Topic: error messages related to lookups
Replies: 10
Views: 11054

error messages related to lookups

Dear all, I used to develop system dynamic models in good old dynamo software which was fairly simple and stright forward. I have now re-written a SD model developed in Dynamo in Vensim which is an application of optimal contril theory to a macroeconomic model but have encountered with problems in s...