How to add Guides

[JoepdeBoer]

I've tried to create a simple wing with guide curves, see xml snippet.
When visualising with Tigle viewer nothing shows up, no errors are shown. When exporting to stl nothing happens. When removed Tigle viewer shows as expected see picture. I assume something is wrong with my guides definition, Can someone provide me with an xml snippet of an guide curve implementation?

<?xml version="1.0" encoding="UTF-8"?>
<cpacs>
  <header>
    <name>test_aircraft</name>
    <description>Testing an Aircraft</description>
    <version>0.2</version>
    <cpacsVersion>3.5</cpacsVersion>
    <versionInfos>
      <versionInfo version="0.2">
        <cpacsVersion>3.5</cpacsVersion>
        <description>Testing an Aircraft</description>
        <timestamp>2025-09-17T14:38:43.902661</timestamp>
        <creator>unknown</creator>
      </versionInfo>
    </versionInfos>
  </header>
  <vehicles>
    <aircraft>
      <model uID="model_2628074251776">
        <name>test_aircraft</name>
        <wings>
          <wing uID="wing_2626952050688">
            <name>LiftingSurface_2626952050688</name>
            <transformation/>
            <sections>
              <section uID="wingsection_2626950807376">
                <name>Section 0</name>
                <transformation>
                  <scaling>
                    <x>1</x>
                    <y>1</y>
                    <z>1</z>
                  </scaling>
                  <rotation>
                    <x>-1.5707963267948966</x>
                    <y>-1.5707963267948966</y>
                    <z>0.0</z>
                  </rotation>
                  <translation refType="absGlobal">
                    <x>0</x>
                    <y>0</y>
                    <z>0</z>
                  </translation>
                </transformation>
                <elements>
                  <element uID="element_2626952637536">
                    <name>LiftingSurfaceElement_2626952637536</name>
                    <airfoilUID>airfoil_2626952638784</airfoilUID>
                    <transformation/>
                  </element>
                </elements>
              </section>
              <section uID="wingsection_2626951320432">
                <name>Section 1</name>
                <transformation>
                  <scaling>
                    <x>1</x>
                    <y>1</y>
                    <z>1</z>
                  </scaling>
                  <rotation>
                    <x>-1.5707963267948966</x>
                    <y>-1.5707963267948966</y>
                    <z>0.0</z>
                  </rotation>
                  <translation refType="absGlobal">
                    <x>0.0</x>
                    <y>10.0</y>
                    <z>0.0</z>
                  </translation>
                </transformation>
                <elements>
                  <element uID="element_2626952639888">
                    <name>LiftingSurfaceElement_2626952639888</name>
                    <airfoilUID>airfoil_2626952640176</airfoilUID>
                    <transformation/>
                  </element>
                </elements>
              </section>
            </sections>
            <segments>
              <segment uID="segment_2626952640704">
                <name>LiftingSurfaceSegment_2626952640704</name>
                <fromElementUID>element_2626952637536</fromElementUID>
                <toElementUID>element_2626952639888</toElementUID>
                <guideCurves>
                  <guideCurve uID="guidecurve_2626952641472">
                    <name>InterpolatedCurve_2626952641472</name>
                    <guideCurveProfileUID>guideprofile_2626952641472</guideCurveProfileUID>
                    <fromRelativeCircumference>0.0</fromRelativeCircumference>
                    <tangent>
                      <x>0.0</x>
                      <y>1.0</y>
                      <z>0.0</z>
                    </tangent>
                    <toRelativeCircumference>0.0</toRelativeCircumference>
                  </guideCurve>
                  <guideCurve uID="guidecurve_2626953150880">
                    <name>InterpolatedCurve_2626953150880</name>
                    <guideCurveProfileUID>guideprofile_2626953150880</guideCurveProfileUID>
                    <fromRelativeCircumference>2.0218656364193293</fromRelativeCircumference>
                    <tangent>
                      <x>0.0</x>
                      <y>1.0</y>
                      <z>0.0</z>
                    </tangent>
                    <toRelativeCircumference>2.0218656364193293</toRelativeCircumference>
                  </guideCurve>
                  <guideCurve uID="guidecurve_2626953150976">
                    <name>InterpolatedCurve_2626953150976</name>
                    <guideCurveProfileUID>guideprofile_2626953150976</guideCurveProfileUID>
                    <fromRelativeCircumference>1.0152377749025077</fromRelativeCircumference>
                    <tangent>
                      <x>0.0</x>
                      <y>1.0</y>
                      <z>0.0</z>
                    </tangent>
                    <toRelativeCircumference>1.0152377749025077</toRelativeCircumference>
                  </guideCurve>
                </guideCurves>
              </segment>
            </segments>
          </wing>
        </wings>
      </model>
    </aircraft>
    <profiles>
      <wingAirfoils>
        <wingAirfoil uID="airfoil_2626952638784">
          <name>ImportedAirfoil_2626952638784</name>
          <pointList>
            <x mapType="vector">1;0.95033;0.90054;0.80078;0.70081;0.60068;0.50039;0.4;0.299;0.24852;0.19809;0.14778;0.09768;0.07273;0.04794;0.02337;0.01128;0;0.01372;0.02663;0.05206;0.07727;0.10232;0.15222;0.20191;0.25148;0.301;0.4;0.49961;0.59932;0.69919;0.79922;0.89946;0.94967;1</x>
            <y mapType="vector">0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0</y>
            <z mapType="vector">0.00084;0.00855;0.01575;0.02858;0.03942;0.0482;0.05473;0.05869;0.05875;0.05677;0.0532;0.04776;0.03987;0.03471;0.02829;0.01944;0.0138;0;-0.01134;-0.01493;-0.01891;-0.02111;-0.02237;-0.02338;-0.0232;-0.02239;-0.02125;-0.01869;-0.01585;-0.01264;-0.00942;-0.00636;-0.00353;-0.00217;-0.00084</z>
          </pointList>
        </wingAirfoil>
        <wingAirfoil uID="airfoil_2626952640176">
          <name>ImportedAirfoil_2626952640176</name>
          <pointList>
            <x mapType="vector">1;0.95033;0.90054;0.80078;0.70081;0.60068;0.50039;0.4;0.299;0.24852;0.19809;0.14778;0.09768;0.07273;0.04794;0.02337;0.01128;0;0.01372;0.02663;0.05206;0.07727;0.10232;0.15222;0.20191;0.25148;0.301;0.4;0.49961;0.59932;0.69919;0.79922;0.89946;0.94967;1</x>
            <y mapType="vector">0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0</y>
            <z mapType="vector">0.00084;0.00855;0.01575;0.02858;0.03942;0.0482;0.05473;0.05869;0.05875;0.05677;0.0532;0.04776;0.03987;0.03471;0.02829;0.01944;0.0138;0;-0.01134;-0.01493;-0.01891;-0.02111;-0.02237;-0.02338;-0.0232;-0.02239;-0.02125;-0.01869;-0.01585;-0.01264;-0.00942;-0.00636;-0.00353;-0.00217;-0.00084</z>
          </pointList>
        </wingAirfoil>
      </wingAirfoils>
      <guideCurves>
        <guideCurveProfile uID="guideprofile_2626952641472">
          <name>InterpolatedCurve_2626952641472</name>
          <pointList>
            <rX mapType="vector">0</rX>
            <rY mapType="vector">0.5</rY>
            <rZ mapType="vector">0</rZ>
          </pointList>
        </guideCurveProfile>
        <guideCurveProfile uID="guideprofile_2626953150880">
          <name>InterpolatedCurve_2626953150880</name>
          <pointList>
            <rX mapType="vector">0</rX>
            <rY mapType="vector">0.5</rY>
            <rZ mapType="vector">0</rZ>
          </pointList>
        </guideCurveProfile>
        <guideCurveProfile uID="guideprofile_2626953150976">
          <name>InterpolatedCurve_2626953150976</name>
          <pointList>
            <rX mapType="vector">0</rX>
            <rY mapType="vector">0.5</rY>
            <rZ mapType="vector">0</rZ>
          </pointList>
        </guideCurveProfile>
      </guideCurves>
    </profiles>
  </vehicles>
</cpacs>

[joergbrech]

Thanks for your question, @JoepdeBoer. I noticed something is off with your fromRelativeCircumference and toRelativeCircumference values. They must be between -1 (lower end trailing edge) and 1 (upper end trailing edge). A value of 0 means leading edge. Does this resolve your issue?