<div dir="ltr">
<div class="gmail-votecell gmail-post-layout--left"><div class="gmail-js-voting-container gmail-d-flex gmail-jc-center gmail-fd-column gmail-ai-center gmail-gs4 gmail-fc-black-300"><p>Dear all,</p><p>I work with Qgis 3.4.
Following to<a href="https://lists.osgeo.org/pipermail/qgis-user/2026-January/056029.html"> my previous message</a> probably unclear. I'm taking the liberty to post a new message.
With Qgis raster batch mode, for the 'expression' column, i would like
to derive automatically the name of the input layer selected setted
throw the input layer column :</p></div></div><br><img src="cid:ii_mkwqdnrv0" alt="image.png" width="578" height="264"><br><br>
But i try to do that, the result is always NULL when i open the 'calcul by expression' window : <br><br><br><img src="cid:ii_mkwqe3io1" alt="image.png" width="578" height="471"><br><br>
<p>I obtain always NULL. Whatever i fill for the arguments for the layer argument : @input, @element</p>
<p>The problem could comes from the syntax of the expression ?</p><div><br></div><div>Thanks so much.</div>
<br><br><br><br><br></div>