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    Ok, thanks for your prompt reply.<br>
    <br>
    Björn<br>
    <br>
    <br>
    -- <br>
    Björn Peeters<br>
    <br>
    Chair of Fluid Mechanics and Institute of Aerodynamics<br>
    RWTH Aachen University<br>
    Wüllnerstraße 5a, 52062 Aachen, Germany<br>
    <br>
    <div class="moz-cite-prefix">Am 09.06.2016 um 15:54 schrieb Joachim
      Pouderoux:<br>
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            <div>Hello,<br>
              <br>
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            There is no way to do such a thing in ParaView.<br>
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          As a work around, what you could do is to transform your
          filter in a 'identity filter' (returning input as output) in
          the case the input data does not have the properties you need
          to process the data.<br>
          <br>
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        Joachim<br>
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                    <div dir="ltr"><b>Joachim Pouderoux</b><font
                        size="2">, PhD</font><br>
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                        rgb(204,204,204);padding-left:1ex"><font
                          size="1"><i>Technical Expert - Scientific
                            Computing Team</i></font><br>
                        <b><font size="1"><a moz-do-not-send="true"
                              href="http://www.kitware.fr"
                              target="_blank">Kitware SAS</a></font></b><br>
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        <div class="gmail_quote">2016-06-09 9:28 GMT+02:00 Björn Peeters
          <span dir="ltr"><<a moz-do-not-send="true"
              href="mailto:b.peeters@aia.rwth-aachen.de" target="_blank">b.peeters@aia.rwth-aachen.de</a>></span>:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
            <br>
            a programmable filter I'm working on requires a specific
            cell data being<br>
            loaded by the input dataset. Currently I'm checking in the<br>
            RequestInformation function if it was loaded and show a
            vtkErrorMacro<br>
            if it doesn't exist. After that the filter is shown in the
            pipeline and could<br>
            be applied, which would result in another error.<br>
            Is there any way to remove the filter from the pipeline or
            disable the<br>
            'Apply' button directly after showing a message ?<br>
            <br>
            Thanks,<br>
            Björn<br>
            <br>
            <br>
            -- <br>
            Björn Peeters<br>
            <br>
            Chair of Fluid Mechanics and Institute of Aerodynamics<br>
            RWTH Aachen University<br>
            Wüllnerstraße 5a, 52062 Aachen, Germany<br>
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