Hi, When you build the HDF4 library, you can use the -DHAVE_NETCDF option for the C compiler, as described in this HDF Newsletter article: http://hdf.ncsa.uiuc.edu/newsletters/newsletter21.html#2 And here's a little more information about a workaround for a problem you may encounter when using that option: http://www.unidata.ucar.edu/support/help/MailArchives/netcdf/msg02412.html If you have the very latest version 4.2r3, they've changed the name of this option: - Modified the HDF4 mfhdf library and configure to work in the absence of the NetCDF-3 header files when the HDF4 library is configured with the --disable-netcdf flag. This feature is required when building the ESDIS Toolkit in the presence of the NetCDF-3 library. In this case, the HDF4 file netcdf.h is used to build the HDF4 libraries and is installed under the name "hdf4_netcdf.h" to avoid a name clash with the NetCDF-3 file netcdf.h. From ftp://ftp.hdfgroup.org/HDF/HDF_Current/src/RELEASE-4.2r3.txt --Russ --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: IWF-312871 Department: Support netCDF Priority: Normal Status: Closed