IDL CDF Patch Download and Installation Instruction:

IDL CDF patch consists of two files: shared CDF library and 
platform-independent Dynamically Loadable Module (DLM) definition file.
Make sure to make the downloaded dynamic library (the .so file) for 
non-Windows executable on your machine.  Please contact
gsfc-cdf-support@lists.nasa.gov if you need a different CDF version. 

Windows:
  Download one of the following files:
     32-bit CDF shared library at windows/x86/idl_cdf.dll and idl_cdf.lib or
     64-bit CDF shared library at windows/x64/idl_cdf.dll and idl_cdf.lib
  Download DLM: idl_cdf.dlm
  Optionally, download the leap second table. Do this only if you're using a
  different leap second table from this release.
  Set the IDL_DLM_PATH and IDL_PATH environment variables to point to the
      directory where you placed the patch. For example, if you placed the
      patch in c:\idl_cdf391_patch, then the command should be
        set IDL_DLM_PATH="c:\idl_cdf391_patch;<IDL_DEFAULT>"
        set IDL_PATH="c:\idl_cdf391_patch;+<IDL_PATH>"
        Note: The above commands must be entered exactly as shown,
              including angle brackets and double quotes, prior to invoking IDL.
        If the patch is checked out fine, you can use the downloaded files:
        idl_cdf.dlm and idl_cdf.dll to replace the ones in the operational
        directory at <your IDL directory>\bin\bin.x86 for 32-bit mode, or
        <your IDL directory>\bin\bin.x86_64 for 64-bit mode. Backup up the
        original files.
  If you have downloaded the leap second table, then set the environment
  variable CDF_LEAPSECONDSTABLE to the table.
      set CDF_LEAPSECONDSTABLE='<your IDL directory>\CDFLeapSeconds.txt'
  This table will be used, instead of the hard-coded one embedded in this
  released library. The step is necessary when the leap second table is
  different from the embedded one. Need to set the environment variable before
  running CDF modules under IDL.
  Invoke IDL and use it as usual.

Mac OS X (Intel):
  Download the following CDF shared library file:
     64-bit CDF shared library at macosX/x86_64/idl_cdf.so for 64-bit Intel
  Download DLM: idl_cdf.dlm
  Optionally, download the leap second table. Do this only if you're using a
  different leap second table from this release.
  Replace idl_cdf.so and idl_cdf.dlm in the
          <your IDL directory>/bin/bin.darwin.x86_64 directory for Intel on
          64-bit mode 
          Backup the original files.
  Set environment variable CDF_LEAPSECONDSTABLE to the downloaded leap second
      table. The step is necessary when a new leap second is added and the
      shared library is not upgraded. 
  If you have downloaded the leap second table, then set the environment
  variable CDF_LEAPSECONDSTABLE to the table.
      setenv CDF_LEAPSECONDSTABLE '<your IDL directory>/CDFLeapSeconds.txt'
  This table will be used, instead of the hard-coded one embedded in this
  released library. The step is necessary when the leap second table is
  different from the embedded one. Need to set the environment variable before
  running CDF modules under IDL.
  Invoke IDL and use it as usual.

Linux (Intel):
  Download one the following CDF shared library files:
     32-bit CDF shared library at linux/linux32/idl_cdf.so for 32-bit Intel or
     64-bit CDF shared library at linux/linux64/idl_cdf.so for 64-bit Intel
  Download DLM: idl_cdf.dlm
  Optionally, download the leap second table. Do this only if you're using a
  different leap second table from this release.
  Set the IDL_DLM_PATH and IDL_PATH environment variables to point to the
  directory where you placed the patch. For example, if you placed the patch in
  /home/harold, then the commands should be
        setenv IDL_DLM_PATH "/home/harold:<IDL_DEFAULT>"  (for tcsh shell)
        export IDL_DLM_PATH="/home/harold:<IDL_DEFAULT>"  (for bash shell)
        setenv IDL_PATH "/home/harold:+<IDL_PATH>"  (for tcsh shell)
        export IDL_PATH="/home/harold:+<IDL_PATH>"  (for bash shell)
        Note: The above commands must be entered exactly as shown, 
              including angle brackets and double quotes, prior to invoking IDL.
        If the patch is checked out fine, you can use the downloaded files to
        replace the ones in the operational directory (may need the root
        access) at <your IDL directory>/bin/bin.linux.x86 for 32-bit mode, or 
        <your IDL directory>/bin/bin.linux.x86_64 for 64-bit mode. Backup
        the original files.
  If you have downloaded the leap second table, then set the environment
  variable CDF_LEAPSECONDSTABLE to the table.
      setenv CDF_LEAPSECONDSTABLE '<your IDL directory>/CDFLeapSeconds.txt'
  This table will be used, instead of the hard-coded one embedded in this
  released library. The step is necessary when the leap second table is
  different from the embedded one. Need to set the environment variable before
  running CDF modules under IDL.
  Invoke IDL and use it as usual.

If you have questions, need assistance, or encounter problems, please contact
us at NASA-CDF-Support@nasa.onmicrosoft.com.