Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I added KMZ data (points) in QGIS using 'add vector layer'.
Points shows up at the right location.
However, when I use Vector-GeometryTools-Export/AddGeometryColumns, it shows error and doesn't add X Y (lat long) to the attribute table.
Try saving as shp first, then add the geometry columns to the shp. If needed, then you can export as kmz again.
Required, but never shown