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<p>Hi Andreas,</p>
<p>I think the easiest approach is to search and replace in the
project files.</p>
<p>Expressions are in so many places in QGIS, it's close to
impossible to write code that finds them all and updates.</p>
<p>Bests</p>
<p>Matthias<br>
</p>
<div class="moz-cite-prefix">On 1/21/19 1:52 PM, Andreas Neumann
wrote:<br>
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<blockquote type="cite"
cite="mid:9d7cf36e7043fbb0814b4994d8b1a4e7@carto.net">
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<p>Hi,</p>
<p>When migrating our version 2 to version 3 projects, most of our
symbology needs revision, because our data-defined properties
used a lot the "$scale" variable.</p>
<p>What is the exact reason that $scale fails in version 3 and had
been replaced by @map_scale?</p>
<p>Is there really no upgrade path for this? We have many, many
projects, and almost all of them need to be upgraded in version
3 to use "@map_scale" instead of "$scale".</p>
<p>Thanks for your reply,</p>
<p>Andreas</p>
<br>
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