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Sue, I was unable to build the netCDF package on our IRIX64 system using the native compilers and the "-i8" option. The problem is that a crucial C macro (NF_INT_IS_C_...) in the file "fortran/ncfortran.h" could not be defined. I suspect, therefore, that there's something wrong with the netCDF package that you built. You should probably check it very carefully. Regards, Steve Emmerson <http://www.unidata.ucar.edu>