Hi Sachin, Maybe this is the result of a simple typing error, specifying "FC=ifot" instead of "FC=ifort", since that's what you reported doing: $ CC=gcc FC=ifot F90=ifort CPPFLAGS="-DNDEBUG -DpgiFortran" FFLAGS="-g -O2 -mp" ./configure --prefix=/usr/local/netcdf/ifort Try FC=ifort and see if it makes a difference. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: IID-757285 Department: Support netCDF Priority: Normal Status: Closed