it would require a very specific configuration not to freeze out, high greenhouse gasses, world spanning oceans, and continental masses that directed ocean and

it would require a very specific configuration not to freeze out, high greenhouse gasses, world spanning oceans, and continental masses that directed ocean and atmospheric currents, all located in a very tight circular orbit, just the right distance from the star. Given that a tidaly locked planet, means a VERY old system, it becomes improbable that conditions for maintaing an atmosphere and water over the radicaly different conditions that the planet experienced on its way to being tidaly locked can be described. so, modeling the steady state condition is possible, but there is no way to model the process that created it.