Ventana software support forum

Hi, everyone

I want to achieve this equation when the equation equal to zero, find the value of p.
So, I used Find Zero function to solve it.
But, when I run the model, the simulation results are incorrect This is because the denominator cannot be 0.
And, when I change the initial x in Find Zero, the results also have error.
The value of p in the equation must not be zero.
I was wondering how to set the equation run it in Vensim if p≠0 is satisfied.
If it can be solved, I uploaded a simple example below.
Thank you very much!

Kind regards

The simple model

I think the immediate problem is that you have the initial guess (initial x) set to 0. If the function's first execution is invalid, it can't proceed with a search.

If you set initial x = 1, it runs, but there's no solution to the equation, so it still fails to converge.

To clarify, the equation in the model uploaded appears to differ from the one in your initial post. The model has no solution; the original equation might.

I don't know what any of this means, but with a corrected expression it works:

tomfid wrote: ↑Mon Oct 14, 2019 6:35 pm I don't know what any of this means, but with a corrected expression it works:
FIND ZERO 2.mdl

I see. Thank you for your help.