Hi all, I'm happy to announce that we found a way to integrate proper NULL value support for also for pre-PyQt 5.7 versions. This fix has been sponsored by OPENGIS.ch - like many others to pave the road towards proper python 3 and Qt5 support. -- Matthias Kuhn OPENGIS.ch - https://www.opengis.ch Spatial • (Q)GIS • PostGIS • Open Source