TextLine not rendered

[00sapo]

I'm using PageViewer 1.4 for Linux.

I have this kind of code:

  <Page imageFilename="c004r.png" imageWidth="2083" imageHeight="2717">
    <CustomRegion id="region_1707499508186_894" type="MusicTextRegion">
      <Coords points="57,36 57,2639 1994,2639 1994,36" />
      <MusicRegion id="s1vuxg5u">
        <Coords points="215,188 215,588 1801,588 1801,188" />
        <UserDefined>
          <UserAttribute name="music-staff" type="xsd:string"
            value="..." />
        </UserDefined>
      </MusicRegion>
      <TextRegion id="region-line_1707499528099_909">
        <Coords points="294,534 294,645 1578,645 1578,534" />
        <TextLine id="line_1707499528099_909">
          <Coords points="294,534 294,645 1578,645 1578,534" />
          <TextEquiv>
            <Unicode>a l&apos;alta donna encoronata.</Unicode>
          </TextEquiv>
        </TextLine>
      </TextRegion>
[...]

The TextRegion is detected, but the button to show the TextLines is disabled.

[tboenig]

Hi @00sapo

Is it possible for you to provide a complete page file? Thank you.