I downloaded three windows binary files (executable, library and gui) and put them in the same folder. When I execute this spatialite command in command line prompt:
INSERT INTO Highways_Buffer (PK_UID, Name, Geometry) SELECT NULL, PK_UID, CastToMultiPolygon(Buffer(Geometry, 300)) FROM HighWays WHERE PK_UID = 1;
It gives me this err:
SQL error: no such function: CastToMultiPolygon
How can I enable cast functions?