(From C. Green, CDF, FNAL) Hi, G4Polyhedra has the confusingly-capitalized method GetNumSIde(). This might be better defined as GetNumSide(). Thanks, Chris.
Fixed in tag "geom-solids-specific-V01-01-01" for geometry/solids/specific. It will be included in Geant4 2.0 public release. Thanks for reporting it.