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Hi Michael, > This should be easy, but it's hard to sort through the config.log file. > Libraries are built in /home/ctdeep/CMAQ/CMAQv5.0.1/lib/netCDF/lib (libz.a > and libs.o)for CMAQ install. Any ideas? > > configure:16417: error: Can't find or link to the z library. Turn off > netCDF-4 and opendap with --disable-netcdf-4 --disable-dap, or see > config.log for errors. Check if your HDF5 library was built with zlib. The easiest way is to look in the libhdf5.settings file in the same directory where the HDF5 library is installed, and search for the line I/O filters (external): deflate(zlib) which might also have other filters in addition to zlib, but if it doesn't have zlib, you'll have to rebuild HDF5 with zlib support. Also, you need to indicate where to find the HDF5 library, using CPPFLAGS and LDFLAGS environment variables, as described in http://www.unidata.ucar.edu/netcdf/docs/getting_and_building_netcdf.html#build_default Note that the "--with-zlib=..." configure option you used is not supported by the netCDF-4 configure, as it's not listed in configure --help output. Instead, zlib must be found either in a default system directory or in locations listed with the CPPFLAGS and LDFLAGS environment variables. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: PPE-116333 Department: Support netCDF Priority: Normal Status: Closed