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Hi Jaafar, > - I want to install PGI Compiler from PGROUP in my system (Red HAT > LINUX86 WITH 64 BIT). Should I remove netCDF since I installed it with > g95? and then install it again with PGI compiler? No, it's not necessary to remove the old installation. You can just build and install netCDF again after the PGI compiler is installed and working. The new installation will replace the old one, if you specify the same place for installation (or again use the default of "/usr/local"). > -How I make sure that netCFD library installed properly and working perfectly? As part of building and installing netCDF from source, you will run the command "make check". This runs thousands of tests and takes several minutes to verify whether everything that was just built actually works. If all the tests pass and "make check" completes without an error message, then the build and test step worked. Then yu run the command "make install" (or you have run both steps at once with "make check install") and that command will complete with a message that begins: Congratulations! You have successfully installed netCDF! As a shortcut on Redhat Linux, you can just often just run your "package manager" which is a program on your desktop. It will show a list of optional packages to install, and netCDF is listed among the optional packages on recent Linux systems. Just select that and let the package manager do all the work of installing things in the right place. When its done, you should have a utility program named "ncdump", and you can make sure it's available by just invoking ncdump -k which will produce output ending with the library version you have installed. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: FRL-611318 Department: Support netCDF Priority: Normal Status: Closed