Hello Dears,I have just got the same error in ice model. I was aware how to solve it, but i would like to wake this topic up. The main reason is that when the error appeared in my simulation, I have not seen any possibility for having ice in this simulation (surface temperature is bigger then 4 Celsius degrees). But i got this error from ice model.I work with my own configuration - it is not typical provided by developers. It is based on G or H compset, thus i have only ice and ocean components active. Other models provide only data (prepared ouside of the model). I did a lot of modifications for having working the cesm as high resolution model for coastal areas. The horizontal resolution is ~100 meters, vertical smallest levels have 30 cm thickness. I will be very happy that somebody will take a look here and try to help/eplain me what happen.With best regards,Jaromir