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    Are you running MacOS? Then see 
    <a class="moz-txt-link-freetext" href="https://www.ncl.ucar.edu/Download/macosx.shtml#InstallCompilers">https://www.ncl.ucar.edu/Download/macosx.shtml#InstallCompilers</a>
    which says that you have to use the GNU 7.x compiler.<br>
    <br>
    I recommend to use the conda or miniconda installation method
    (<a class="moz-txt-link-freetext" href="https://www.ncl.ucar.edu/Download/conda.shtml">https://www.ncl.ucar.edu/Download/conda.shtml</a>) which takes care on
    all dependencies and environment variables.<br>
    <br>
    -Karin<br>
    <br>
    <div class="moz-cite-prefix">Am 29.09.21 um 18:08 schrieb Xin Wen:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAHHvpsnTCBNq6qj--EmdAXdaYxsn6NcZkY-Q2-+BtwOT+Q65PQ@mail.gmail.com">
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      <div dir="ltr">Hi Karin,
        <div><br>
        </div>
        <div>Thanks for this detailed explanation. Now I am able to set
          the environment and path to the right directory.</div>
        <div><br>
        </div>
        <div>When I test the ncl with ncl , it shows that </div>
        <div>'<span
style="font-variant-ligatures:no-common-ligatures;color:rgb(0,0,0);font-family:Menlo;font-size:11px">dyld:
            Library not loaded: /usr/local/lib/libgfortran.4.dylib</span></div>
        <p class="gmail-p1"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
            class="gmail-s1"
            style="font-variant-ligatures:no-common-ligatures"><span
              class="gmail-Apple-converted-space">  </span>Referenced
            from: /Users/home/local/ncl-6.6.2/bin/ncl</span></p>
        <div><span class="gmail-Apple-converted-space"
style="font-variant-ligatures:no-common-ligatures;color:rgb(0,0,0);font-family:Menlo;font-size:11px">  </span><span
style="font-variant-ligatures:no-common-ligatures;color:rgb(0,0,0);font-family:Menlo;font-size:11px">Reason:
            image not found</span>'</div>
        <div><br>
        </div>
        <div>However, I checked my gcc version and gfortran version are
          up to date</div>
        <div>
          <p class="gmail-p1"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
              class="gmail-s1"
              style="font-variant-ligatures:no-common-ligatures">gcc
              (GCC) 10.2.0</span></p>
          <p class="gmail-p1"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
              class="gmail-s1"
              style="font-variant-ligatures:no-common-ligatures">
            </span></p>
          <p class="gmail-p1"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
              class="gmail-s1"
              style="font-variant-ligatures:no-common-ligatures">GNU
              Fortran (GCC) 10.2.0</span></p>
          <p class="gmail-p1"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
              class="gmail-s1"
              style="font-variant-ligatures:no-common-ligatures"><br>
            </span></p>
          <p class="gmail-p1"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
              class="gmail-s1"
              style="font-variant-ligatures:no-common-ligatures">Best
              regards</span></p>
          <p class="gmail-p1"
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
              class="gmail-s1"
              style="font-variant-ligatures:no-common-ligatures">Xin</span></p>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">Karin Meier-Fleischer <<a
            href="mailto:meier-fleischer@dkrz.de" moz-do-not-send="true">meier-fleischer@dkrz.de</a>>
          于2021年9月29日周三 上午2:43写道:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div> Please, reply to the mailing list to keep others up to
            date.<br>
            <br>
            I hope you mean the .hluresfile file ;)<br>
            <br>
            You have to add the bin directory to the PATH environment
            variable - read <a
              href="https://www.ncl.ucar.edu/Download/install_from_binary.shtml"
              target="_blank" moz-do-not-send="true">https://www.ncl.ucar.edu/Download/install_from_binary.shtml</a><br>
            You can find all information what is need in the
            documentation.<br>
            <br>
            "...<br>
            Given your UNIX shell and using "/usr/local/ncl-6.6.2" as an
            example path, here's which "dot" file to edit and what lines
            to add (use a UNIX editor to make the changes):<br>
            <p> <b>csh/tcsh</b> (the file might be ".cshrc" or
              ".tcshrc"): </p>
            <p> </p>
            <pre>    setenv NCARG_ROOT /usr/local/ncl-6.6.2
    setenv PATH $NCARG_ROOT/bin:$PATH

..."

</pre>
            -Karin<br>
            <br>
            <div>Am 28.09.21 um 19:43 schrieb Xin Wen:<br>
            </div>
            <blockquote type="cite">
              <div dir="ltr">This command works!!! now the '<span
style="font-variant-ligatures:no-common-ligatures;color:rgb(0,0,0);font-family:Menlo;font-size:11px">env
                  | grep NCARG</span>' shows that 
                <p
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
                    style="font-variant-ligatures:no-common-ligatures">NCARG_ROOT=/Users/home/local/ncl-6.6.2</span></p>
                <p
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
                    style="font-variant-ligatures:no-common-ligatures"><br>
                  </span></p>
                <p
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
                    style="font-variant-ligatures:no-common-ligatures">However,
                    the ncl still does not work. I already add
                    '.bluresfile' in my home directory.</span></p>
                <p
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
                    style="font-variant-ligatures:no-common-ligatures"><br>
                  </span></p>
                <p
style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span
                    style="font-variant-ligatures:no-common-ligatures">Xin</span></p>
              </div>
              <br>
              <div class="gmail_quote">
                <div dir="ltr" class="gmail_attr">Karin Meier-Fleischer
                  <<a href="mailto:meier-fleischer@dkrz.de"
                    target="_blank" moz-do-not-send="true">meier-fleischer@dkrz.de</a>>
                  于2021年9月28日周二 下午12:31写道:<br>
                </div>
                <blockquote class="gmail_quote" style="margin:0px 0px
                  0px 0.8ex;border-left:1px solid
                  rgb(204,204,204);padding-left:1ex">
                  <div> If you use tcsh you have to set the environment
                    variable in a different way 😉<br>
                    <br>
                       setenv NCARG_ROOT /Users/home/local/ncl-6.6.2<br>
                    <br>
                    -Karin<br>
                    <br>
                    <div>Am 28.09.21 um 19:17 schrieb Xin Wen:<br>
                    </div>
                    <blockquote type="cite">
                      <div dir="ltr">Hi Karin,
                        <div><br>
                        </div>
                        <div>Thanks for your reply, I was able to
                          install ncl in another directory. However,
                          when I tried to set the environment, I put the
                          command </div>
                        <div>'<span
style="font-variant-ligatures:no-common-ligatures;color:rgb(0,0,0);font-family:Menlo;font-size:11px">NCAR_ROOT=/Users/home/local/ncl-6.6.2</span>' </div>
                        <div>using terminal t-csh in the directory in
                          which ncl was installed, it returns that
                          command not found. </div>
                        <div><br>
                        </div>
                        <div>Xin</div>
                      </div>
                      <br>
                      <div class="gmail_quote">
                        <div dir="ltr" class="gmail_attr">Karin
                          Meier-Fleischer via ncl-install <<a
                            href="mailto:ncl-install@mailman.ucar.edu"
                            target="_blank" moz-do-not-send="true">ncl-install@mailman.ucar.edu</a>>
                          于2021年9月28日周二 上午2:12写道:<br>
                        </div>
                        <blockquote class="gmail_quote"
                          style="margin:0px 0px 0px
                          0.8ex;border-left:1px solid
                          rgb(204,204,204);padding-left:1ex">
                          <div> Hi Xin,<br>
                            <br>
                            the directory /usr is owned by root and it
                            seems to be that you do not have root
                            permission.<br>
                            <br>
                            You can install NCL in another directory for
                            example<br>
                            <br>
                               mkdir $HOME/local/ncl-6.6.2<br>
                            <br>
                            At least you have to set the NCARG_ROOT
                            environment variable to this directory<br>
                            <br>
                               export NCARG_ROOT=$HOME/local/ncl-6.6.2<br>
                            <br>
                            Ciao,<br>
                            Karin<br>
                            <br>
                            <div>Am 27.09.21 um 23:38 schrieb Xin Wen
                              via ncl-install:<br>
                            </div>
                            <blockquote type="cite">
                              <div dir="ltr">Hi,
                                <div><br>
                                </div>
                                <div>I'm trying to install NCL on my
                                  MacOS. By now, I already finished
                                  steps of :</div>
                                <div>
                                  <ul style="margin:0px 0px
5px;padding:0px;list-style-position:inside;color:rgb(0,0,0);font-family:verdana,sans-serif;font-size:13.3333px">
                                    <li style="margin:0px;padding:0px
                                      0px 0px
                                      25px;font-size:10pt;line-height:12pt;color:rgb(51,51,51)">Install
                                      XQuartz</li>
                                    <li style="margin:0px;padding:0px
                                      0px 0px
                                      25px;font-size:10pt;line-height:12pt;color:rgb(51,51,51)">Install
                                      gcc and gfortran</li>
                                    <li style="margin:0px;padding:0px
                                      0px 0px
                                      25px;font-size:10pt;line-height:12pt;color:rgb(51,51,51)">Go
                                      to list of available NCL binaries
                                      on the Climate Data Gateway</li>
                                    <li style="margin:0px;padding:0px
                                      0px 0px
                                      25px;font-size:10pt;line-height:12pt;color:rgb(51,51,51)">Choose
                                      and download the right NCL binary
                                      for your MacOSX system </li>
                                  </ul>
                                  <font face="verdana, sans-serif"
                                    color="#333333"><span
                                      style="font-size:13.3333px">When I
                                      try to install NCL from a
                                      downloaded binary, it recommends
                                      the following two command lines on
                                      the website.</span></font></div>
                                <div>
                                  <pre style="white-space:pre-wrap;margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;font-family:courier;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)">    mkdir /usr/local/ncl-6.6.2
    tar -zxf ~/Downloads/ncl_ncarg-6.6.2-MacOS_10.13_64bit_gnu730.tar.gz -C /usr/local/ncl-6.6.2</pre>
                                  <pre style="white-space:pre-wrap;margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><font face="verdana, sans-serif">However, this 'mkdir /usr/local/ncl-6.6.2' permission was denied. Could you please help me with this? </font></pre>
                                  <pre style="white-space:pre-wrap;margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><font face="verdana, sans-serif">BTW, my gfortran version is 'GNU Fortran (GCC) 10.2.0', and gcc version is 'gcc (GCC) 10.2.0'</font></pre>
                                  <pre style="white-space:pre-wrap;margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><font face="verdana, sans-serif">Best regards,</font></pre>
                                  <pre style="white-space:pre-wrap;margin-top:0px;margin-bottom:0px;padding:0px;font-size:13.3333px;line-height:12pt;border-style:solid;border-width:0px 0px 15px;border-color:transparent;color:rgb(0,0,0)"><font face="verdana, sans-serif">Xin</font></pre>
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