Hi Andrea,
I installed version 3.40.4 ltr and when I use the same "export to
raster" algorithm, I get a new message:
/QGIS Version: 3.40.4-Bratislava
Code Revision: 4dd7d7e969
Qt Version: 5.15.13
Python Version: 3.12.9
GDAL Version: 3.10.2
GEOS Version: 3.13.0-CAPI-1.19.0
Proj Version: Rel. 9.5.1, December 1st, 2024
PDAL version: 2.8.3 (git-version: 56e405)
Algorithm started at: 2025-12-14T14:13:01
Starting algorithm 'Export to raster (using triangulation)'…
Input parameters:
{ '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 }
wrench command: C:/program files/QGIS
3.40.4/apps/qgis-ltr/./pdal_wrench.exe to_raster_tin "--input=E:/My
Documents/QGIS/LIDAR slabs/LHD_FXX_0801_6398_PTS_LAMB93_IGN69.copc.laz"
"--output=E:/Mes Documents/QGIS/dalles MNT/0801-6398k.tif"
--resolution=0.05 --tile-size=1000 "--filter=Classification == 2 ||
The process stopped so unexpected
Execution failed after 2.89 seconds
Loading result layers
The following layers were not generated correctly.
• E:/My Documents/QGIS/dalles MNT/0801-6398k.tif
You can check the 'Log Messages Panel' in the QGIS main window to find
more information about the algorithm execution./
Thank you in advance for your suggestion.
Best regards.
PW
Le 14/12/2025 à 08:42, Andrea Giudiceandrea a écrit :
Pascal WISSENBERG p.wissenberg at orange.fr
Sat Dec 13 01:51:31 PST 2025
j'utilise QGis 3.34.5 et depuis quelques jours, lorsque je veux
exporter un fichier LIDARHD de l'IGN vers un raster (en utilisant la
triangulation) pour obtenir un fichier MNT, j'ai un retour:
/Warning 1: Can't open E:/ Mes Documents/QGIS/ Dalles
MNT\0887-6754m\0_0.tif. Skipping it/ par exemple.
Hi Pascal,
actually you are using QGIS 3.44.5, according to the provided log.
Unfortunately, it looks like there is an issue when using the PDAL
"Export to raster (using triangulation)" processing algorithm running
the QGIS 3.44.5 and QGIS LTR 3.40.13 on Windows in order to convert a
COPC file to a GeoTIFF file.
You should be able to perform the conversion on Windows 10 running a
previous QGIS version, like QGIS LTR 3.40.7 [1].
Best regards.
Andrea Giudiceandrea
[1] https://qgis.org/downloads/QGIS-OSGeo4W-3.40.7-1.msi
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