Impossible to find the steady state (the sum of square residuals of the static equations is 0.0004). Either the model doesn’t have a steady state, there are an infinity of steady states, or the guess values are too far from the solution.

Isn’t the residuals small enough?

I have 30 equations and cannot find the analytical solution, so I use outside m file to solve the s.s. numerically.

Usually, considerable simplification is the only way to proceed. At a minimum, you should try to reduce your problem of finding the steady state to a couple of equations that you solve numerically. That allows cross-checking at least some of the equations with your analytical steady state computations.