Hello guys, I tried to use ERA-interim for my experiment rather than ERA40, but it did not work. What is the problem? My data is in "float"-precision and not "short" as ERA40. Then, my coordinates are called slightly differently, ie. "longitudes" is called "lon" etc. Or is the problem the time coordinate? In ERA40 it is  "date" in days since 1st January of the same year, while in my ERA-interim files the coordinate "time" contains  %Y%m%d.%f . can any one guess what is problem in this case?. thanks in advance Abubakr Salih MISU, Stockholm University