Load int.faunalia.it/~paolo/tempdata.zip Properties>Style>Categorized>Value>Bang! <class 'qgis.core.QgsVectorLayer'> Errore di segmentazione Note: all Values are NULL QGIS code revision 34b95d3 All the best. -- Paolo Cavallini - Faunalia www.faunalia.eu Full contact details at www.faunalia.eu/pc