Sandeep, Unfortunately, we are unable to help with this problem. I could not find any similar problems in our support archives. Sorry, but we don't have the resources to provide support for NCO or other third-party packages written by others that use netCDF. I suggest you contact the author of NCO for help with this problem, which does not appear to be related to the netCDF library. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: KCB-778033 Department: Support netCDF Priority: Normal Status: Closed