Hello, Marblewidget (master-branch, Qt 4.7.4) cannot be compiled in MS Visual C++ 2010 due to line 34 in GeoDataParser.h: GeoDataDocument* geoDataDoc(GeoParser& parser) GEODATA_EXPORT; Changing the line to GEODATA_EXPORT GeoDataDocument* geoDataDoc(GeoParser& parser); works. Joachim Puhr