Hi Andrea,
With your latest advice, everything is working again: I did indeed
forget to repeat "Classification="
Thank you very much.
Best regards.
PW
Le 14/12/2025 à 21:04, Andrea Giudiceandrea a écrit :
Hi Pascal,
in my previous message I advised you to install QGIS LTR 3.40.7, not
QGIS LTR 3.40.4.
Anyway, QGIS LTR 3.40.4 should also work (since the original error
doesn't occur, according to the log), provided that your system has
enough free resources to perform the task and that the algorithm's
parameters value are correct.
It looks like this time the pdal_wrench application (which the
processing algorithm relies on) crashed because you have set the
FILTER_EXPRESSION parameter with an incorrect expression (previously
you have set a different and correct expression, instead).
The expression "Classification = 2 OR 6" is incorrect.
An equivalent correct one is "Classification = 2 OR Classification = 6".
Moreover, are you sure your system has enough free RAM and storage
space to process a copc file containing 32 millions points on a 1000m
x 1000m area in order to create a 20'000px x 20'000px raster GeoTIFF
(due to the fact that you have set RESOLUTION=0.05)?
Regards.
Andrea
Il 14/12/2025 15:21, Pascal WISSENBERG ha scritto:
I installed version 3.40.4 ltr and when I use the same "export to
raster" algorithm, I get a new message:
{ 'FILTER_EXPRESSION' : 'Classification = 2 OR 6', 'FILTER_EXTENT' :
None, 'INPUT' : 'copc://E:/My Documents/QGIS/LIDAR
tiles/LHD_FXX_0801_6398_PTS_LAMB93_IGN69.copc.laz', 'ORIGIN_X' :
None, 'ORIGIN_Y' : None, 'OUTPUT' : 'E:/My Documents /QGIS/dalles
MNT/0801-6398k.tif', 'RESOLUTION': 0.05, 'TILE_SIZE': 1000 }
The process stopped so unexpected
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