Dear fvitt, it's cesm 1.2.1. The only version that I was able to install on my machine. I also tried another approach: cut everything inside the netcdf file that was before the year 39-01-01 and changed atm_in to 00390101, and didn't work. I changed the 39-01-01 to 0039-01-01 ... didn't work too. And also changed atm_in to 2039-01-01, and nothing.Any help will be very appreciated.Thanks