Hi Alexander,
I moved to new version 26.5 and here my results:
Please see:
Test data(input/output/QGIS)
5362 Gml Csv.zip (57.0 KB)
Thanks,...Bug 5362: Gml to Csv- Conversion succeeded, output in QGIS -...Aspose.GIS 26.5 the GML‑to‑CSV conversion completes without errors...