> Hi Michael, I'm sending you attached the ctl file of the cosmo GRIB file. > I'm sure that you know that on this file we can see the description of the > grib file content. Hi Flavio, I received the ctl file and looked through it, but I'm not sure what you want me to do with it. I understood that you were trying to display a grid of Temperature at 500mb pressure. I looked through the ctl file and did not see such a grid. Instead I see a lot of hybrid layer grids that look consistent with what GDINFO reports. If you want to plot 500mb Temp you must confirm that the grid file being used has such a field. The Cosmo grid file does not contain such a grid. Michael James Unidata User Support Ticket Details =================== Ticket ID: RGI-969779 Department: Support GEMPAK Priority: Normal Status: Open