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    Thanks for your long answer Scott.<br>
    <br>
    seemed that I had a wrong x server configuration. I setup a new user
    and now it works. I think you can't use x or the paraview web stuff
    as a root user.<br>
    <br>
    <div class="moz-cite-prefix">Am 07.09.2016 um 18:05 schrieb Scott
      Wittenburg:<br>
    </div>
    <blockquote
cite="mid:CAPiw4fA7uELp2d4-3sgAt353S7+6vgiyU0VyCMBY_siULJkXAw@mail.gmail.com"
      type="cite">
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          <div>
            <div>
              <div>Hi Daniel,<br>
                <br>
              </div>
              <div>   I have several thoughts after reading your email,
                though I'm not sure how helpful they may be.  First, the
                error you reported doesn't sound (to me) like the
                typical error you might see when you do not have your
                graphics environment configured properly.  I assume that
                even without a display you are setting up an X server
                and making sure to set the DISPLAY environment variable
                before running the script?  Even though you are not
                using EC2, some of the information at the link below
                could pertain to your situation:<br>
                <br>
                <a moz-do-not-send="true"
href="http://kitware.github.io/paraviewweb/docs/guides/graphics_on_ec2_g2.html">http://kitware.github.io/paraviewweb/docs/guides/graphics_on_ec2_g2.html</a><br>
                <br>
              </div>
              <div>hopefully that gets you pointed in the right
                direction.<br>
                <br>
              </div>
              <div>   Another thing to note: I don't believe that the
                pv_web_visualizer python script is included in ParaView
                anymore, though I don't recall exactly when that moved
                (it appears you are using version 5 or above).  Now the
                web side of ParaView has moved into various other github
                repositories:<br>
                <br>
              </div>
              <div>Core Libraries: <a moz-do-not-send="true"
                  href="https://github.com/Kitware/paraviewweb">https://github.com/Kitware/paraviewweb</a><br>
              </div>
              <div>Web Visualizer Application: <a
                  moz-do-not-send="true"
                  href="https://github.com/Kitware/visualizer">https://github.com/Kitware/visualizer</a><br>
                <br>
                   These days you will find the equivalent of the
                pv_web_visualizer.py script in the above repo (located
                under "server/pvw-visualizer.py").<br>
                <br>
              </div>
              <div>   However, if you do indeed have the python script
                in the location stated in your email, then I'm not sure
                what could be causing the apparent json error you
                mentioned.  Normally though, one might have provided
                some arguments to that python script in the use case it
                seems you are targeting, although perhaps you just left
                them out when composing your email.  For example, if you
                did not provide a "--content" argument, specifying the
                path to the static content you are serving, are you
                managing that another way?<br>
              </div>
              <br>
            </div>
               Feel free to post more information such as the complete
            command line you are invoking, how you are connecting from
            your browser (assuming you get that far), or perhaps more
            error output if there is any.<br>
            <br>
          </div>
             Hope this helps.<br>
          <br>
        </div>
        <div>Cheers,<br>
        </div>
        Scott<br>
        <div>
          <div><br>
            <br>
          </div>
        </div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Wed, Sep 7, 2016 at 6:17 AM, Daniel
          Zuidinga <span dir="ltr"><<a moz-do-not-send="true"
              href="mailto:info@seoaachen.de" target="_blank">info@seoaachen.de</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
            <br>
            I try to get pvweb to run on my server without monitor (but
            intel graphics card). Seems not as easy as I thought. I run
            e.g. the visualizer:<br>
            <br>
            /root/salome_meca/V2016/prereq<wbr>uisites/Paraview-v501_EDF/bin/<wbr>pvpython
            /root/salome_meca/V2016/prereq<wbr>uisites/Paraview-v501_EDF/lib/<wbr>paraview-5.0/site-packages/<wbr>paraview/web/pv_web_visualizer<wbr>.py<br>
            <br>
            and I get the error:<br>
            <br>
            terminate called after throwing an instance of
            'Json::LogicError'<br>
              what():  in Json::Value::find(key, end, found): requires
            objectValue or nullValue<br>
            <br>
            <br>
            any ideas?<br>
            <br>
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