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    <p>Hello list</p>
    <p>I'm getting the error below processing a tile from Vietnam:</p>
    <p><span style="font-family:monospace"><span
          style="color:#000000;background-color:#ffffff;">Exception in
          thread "main" java.lang.AssertionError
        </span><br>
               at
        uk.me.parabola.imgfmt.app.net.RoadIndex.write(RoadIndex.java:45)
        <br>
               at
        uk.me.parabola.imgfmt.app.net.RoadDef.writeLevelDivs(RoadDef.java:356)
        <br>
               at
        uk.me.parabola.imgfmt.app.net.RoadDef.writeNet1(RoadDef.java:237)
        <br>
               at
        uk.me.parabola.imgfmt.app.net.NETFile.write(NETFile.java:68)
        <br>
               at
        uk.me.parabola.mkgmap.build.MapBuilder.makeMap(MapBuilder.java:355)
        <br>
               at
        uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:114)
        <br>
               at
        uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:70)
        <br>
               at
        uk.me.parabola.mkgmap.main.Main.lambda$processFilename$1(Main.java:291)
        <br>
               at
        java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        <br>
               at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor<br>
        .java:1128)
        <br>
               at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecuto<br>
        r.java:628)
        <br>
               at java.base/java.lang.Thread.run(Thread.java:829)<br>
      </span></p>
    <p>The simplest command triggering the error is: java -jar
      mkgmap.jar --route 51120021.o5m</p>
    <p>Tile can be downloaded from
      <a class="moz-txt-link-freetext" href="https://alternativaslibres.org/tmp/51120021.o5m">https://alternativaslibres.org/tmp/51120021.o5m</a></p>
    <p>My mkgmap version is 4907<br>
    </p>
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