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Charlie, It looks like, with netCDF-4, that you have to specify the HDF5 include-directory and library-directory as well as the netCDF ones to the configure(1) script. On my Linux workstation, I did this: (reverse-i-search)`./con': PERL_MANDIR=/usr/share/man CPP_NETCDF='-I/upc/netcdf-4/include -I/usr/local/include' LD_NETCDF='-L/upc/netcdf-4/lib -lnetcdf -L/usr/local/lib -lhdf5 -lhdf5_hl' ./configure &>configure.log && echo OK So, try this: 1. Execute a "make distclean". 2. Execute the configure(1) script with CPP_NETCDF and LD_NETCDF modified to reference your HDF5 installation. 3. Execute the "make" and "make test". 4. Execute the "make install" (probably as root in order to install into the perl(1) installation). Let me know. Regards, Steve Emmerson Ticket Details =================== Ticket ID: EAI-177889 Department: Support netCDF Perl Priority: Normal Status: Closed