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Hi Sean, > Does NetCDF support IPv6? The netCDF library doesn't depend on IPV6 unless you build it with OPeNDAP client support, which is the default if the curl library is installed where it can be found by the configure script at build time. If the curl library supports IPv6, then netCDF's OPeNDAP clinet library also supports it. Recent versions of curl support IPv6 by default, but this can be turned off at build time. So, in summary, to find out if your netCDF installation supports IPv6, just check whether the underlying curl library it was built with has IPv6 support, using the "curl-config" command, as in: $ curl-config --features SSL IPv6 libz IDN and if "IPV6" is one of the lines in the output, it is supported. If there is no installed curl-config command, chances are the curl library is too old to support IPv6. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: VDL-808876 Department: Support netCDF Priority: Normal Status: Closed