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    <p>Hi,</p>
    <p>reverting to 3.10 will be difficult as the QGIS server is on an
      external server on which I have little control. But maybe I must
      mention that I am on Desktop 3.18 and the server on 3.16. I could
      maybe go back to the LTR desktop and see what happens.</p>
    <p>But also during the process I upgraded the Lizmap plugin...not
      sure whether that made a difference. But I also noticed that the
      "display children" in the popup does not work (it also used to
      work). So somewhere there is a problem with detecting the
      relationship?</p>
    <p>I will try a few things, including updating the server and
      provide feedback if I find anything worth noting.</p>
    <p>Immo<br>
    </p>
    <div class="moz-cite-prefix">On 2021/03/18 10:46, Nicolas Boisteault
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:71c50d32-d9c7-a715-739c-daeb85cd219f@3liz.com">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <p>Hi,</p>
      <p>Can you try with QGIS Desktop and Server 3.10 ?<br>
      </p>
      <div class="moz-cite-prefix">Le 17/03/2021 à 16:41, Immo Blecher a
        écrit :<br>
      </div>
      <blockquote type="cite"
        cite="mid:a43460ea-5f75-8f06-73cd-8c1fbc00a7c7@blecher.co.za">
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          charset=UTF-8">
        <p>Hi All,<br>
        </p>
        <p>My Setup:</p>
        <ol>
          <li>Lizmap 3.4.0</li>
          <li>QGIS Server 3.16</li>
          <li>All on Linux Server (not sure which one, offsite)</li>
          <li>All spatial and table data in PosgreSQL<br>
          </li>
        </ol>
        <p>I had a Dataviz set up with a bar chart for monthly rainfall
          [mm] to display in the popup by clicking on a rainfall station
          on the map. First I only had 3 sites which worked fine. Then I
          added another four sites and now the chart header briefly
          flashes and disappears again.</p>
        <p>The rainfall station table is the master and the rainfall
          readings are in a detail table (1-N) with 4 fields...ID,
          site_id, date, reading and the relation set up with the
          Rainfall station table's site_id. The readings are 1 per month
          (monthly rainfall), so in Dataviz the X is the date field and
          the Y is the reading field. There are about 3700 readings
          (about 400 to 700 per site). Is there any limitation on that?
          Why did it work with 3 sites and not with the seven? But now
          even when reverting to the 3 sites it does not work any more.
          Is that a cache problem? The detail table with the rainfall
          readings is ticked in the WFS QGIS Server setup and the whole
          project is valid.<br>
        </p>
        <p>It seems to be a problem with the relation (maybe???), but in
          QGIS info tool the relations show fine (the detail data is
          there).</p>
        <p>This is quite frustrating.</p>
        <p>Regards<br>
        </p>
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            <strong><font color="#000000">Immo F. Blecher</font></strong><strong><font
                color="#808080"><br>
                Street: </font></strong><em><font color="#808080">50
                Lynedoch Eco Village, Lynedoch, Stellenbosch, 7603,
                South Africa<br>
              </font></em><em><span style="font-variant: normal"><font
                  color="#808080"><span style="font-style: normal"><b>Postal:</b></span></font></span></em><em><font
                color="#808080"> PO Box 74, Lynedoch, 7603, South Africa<br>
              </font></em><em><span style="font-variant: normal"><font
                  color="#808080"><span style="font-style: normal"><b>Cell:</b></span></font></span></em><em><font
                color="#000000"> </font></em><font color="#808080">+27
              83 272 6791 </font><font color="#ff6600">|</font><font
              color="#666666"> </font><font color="#666666"><b>Office:</b></font><font
              color="#808080"> +27 81 359 3704 </font><font
              color="#ff6600">|</font><font color="#666666"> </font><font
              color="#666666"><b>Fax: </b></font><font color="#808080">+27
              81 359 3704<br>
            </font><font color="#808080"><b>Email:</b></font><font
              color="#808080"> </font><a
              href="mailto:immo@blecher.co.za" moz-do-not-send="true"><font
                color="#0000ff"><u>immo@blecher.co.za</u></font></a> <font
              color="#ff6600">| </font><a
              href="mailto:immob19@gmail.com" moz-do-not-send="true"><font
                color="#0000ff"><u>immob19@gmail.com</u></font></a><br>
            <font color="#666666"><span style="text-decoration: none"><b>Internet:</b></span></font><font
              color="#666666"><span style="text-decoration: none"> </span></font><a
              href="https://www.blecher.co.za/" moz-do-not-send="true"><font
                color="#0000ff"><span style="text-decoration: none"><u>https://www.blecher.co.za/</u></span></font></a></p>
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        <pre class="moz-quote-pre" wrap="">_______________________________________________
Lizmap mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Lizmap@lists.osgeo.org" moz-do-not-send="true">Lizmap@lists.osgeo.org</a>
<a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/lizmap" moz-do-not-send="true">https://lists.osgeo.org/mailman/listinfo/lizmap</a>
</pre>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
Lizmap mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Lizmap@lists.osgeo.org">Lizmap@lists.osgeo.org</a>
<a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/lizmap">https://lists.osgeo.org/mailman/listinfo/lizmap</a>
</pre>
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        <strong><font color="#000000">Immo F. Blecher</font></strong><strong><font
            color="#808080"><br>
            Street:
          </font></strong><em><font color="#808080">50 Lynedoch Eco
            Village,
            Lynedoch, Stellenbosch, 7603, South Africa<br>
          </font></em><em><span style="font-variant: normal"><font
              color="#808080"><span style="font-style: normal"><b>Postal:</b></span></font></span></em><em><font
            color="#808080">
            PO Box 74, Lynedoch, 7603, South Africa<br>
          </font></em><em><span style="font-variant: normal"><font
              color="#808080"><span style="font-style: normal"><b>Cell:</b></span></font></span></em><em><font
            color="#000000">
          </font></em><font color="#808080">+27 83 272 6791 </font><font
          color="#ff6600">|</font><font color="#666666">
        </font><font color="#666666"><b>Office:</b></font><font
          color="#808080">
          +27 81 359 3704 </font><font color="#ff6600">|</font><font
          color="#666666">
        </font><font color="#666666"><b>Fax: </b></font><font
          color="#808080">+27
          81 359 3704<br>
        </font><font color="#808080"><b>Email:</b></font><font
          color="#808080">
        </font><a href="mailto:immo@blecher.co.za"><font color="#0000ff"><u>immo@blecher.co.za</u></font></a>
        <font color="#ff6600">| </font><a
          href="mailto:immob19@gmail.com"><font color="#0000ff"><u>immob19@gmail.com</u></font></a><br>
        <font color="#666666"><span style="text-decoration: none"><b>Internet:</b></span></font><font
          color="#666666"><span style="text-decoration: none">
          </span></font><a href="https://www.blecher.co.za/"><font
            color="#0000ff"><span style="text-decoration: none"><u>https://www.blecher.co.za/</u></span></font></a></p>
      <p style="border: none; padding: 0cm; background: transparent"><font
          style="font-size: 8pt" size="1"><span style="text-decoration:
            none">Please
            consider your environmental responsibility. Before printing
            this
            e-mail message, ask yourself whether you really need a hard
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