Hi Alexander,
I moved to new version 26.5 and here my results:
Please see:
Comparison (left -csv, right -Gdb) through GeoJson.
image.png (206.5 KB)
Test data(input/output/QGIS)
5335-Csv-Gdb.zip (53.5 KB)
Thanks, …... Comparison (left -csv, right -Gdb) through...GIS v26.5 and produces a valid File Geodatabase that QGIS can read:...