Hi I am trying to solve the following equation
Where 
is the electric field in the y direction inside a capacitor
and u at y=0 equals pi/60 and y=D equals -pi/60
To solve the equation I am using the electrostatic module and the Poisson's equation.
However I am getting the following error. "Failed to find a solution for the initial parameter.
Maximum number of Newton iterations reached.
Returned solution is not converged."
I believe that this is due to because my intial values are too off from the solution. However, if I change the voltage applied to the capactior I need to use another intial values. Futhermore depending on what inital values I give it I get different results.
Do you guys have any idea what are some good initial values to give it?