@urskaufmann Can you test if this solves the following issues: I have tested just the wastewater_node.fk_hydr_geometry. Export DSS, DSS with selection, SIA405 with selection is ok. Import works als ...

This is a the second time I've run into weird behavior with __getattr__ in PythonWin ... the behavior is different, the bug may not be: #2069 Expected behavior (when run in Idle): Python 3.10.2 (ta ...