I've been told that the latest version of the polygonizer ('Polygonize') needs Shapely version 1.2.16 or higher. N. -- View this message in context: http://osgeo-org.1560.x6.nabble.com/problems-with-polygonize-with-qgis2-2-tp5106154p5106298.html Sent from the Quantum GIS - User mailing list archive at Nabble.com.