Ventana software support forum

this is my model i dont understand what doesnt it run can any one help me?

You have simultaneous equations. Unfortunately I do not understand the language so cannot really advise you on what to do.

There are plenty of threads on the forum on how to solve these. What you have is something like
a=d
d=c
c=b
b=a

So you cannot calculate it.

If you can translate the relevant parts of the model into English, I would be happy to try and work out what you need to do to fix.

im so sorry
my models language is persian. i forget translate that
This is the end Thanks
tanx