Hi there, I'm a little confused by the documentation of the multi_array lib. The begin() is supposed to return an iterator, but dereferencing doesn't resolve into the value type. This makes it a little complicated to use multi_arrays with standard algorithms. Please consider the following code snippet which wont compile on VC 7.1. class tVoxel { public: typedef short tValue; tVoxel(): _oValue( 0 ) {} tVoxel(tValue oValue): _oValue( oValue ) {} void set( const tValue& oValue ) { _oValue = oValue; } tValue& get() { return _oValue; } const tValue& get() const { return _oValue; } private: tValue _oValue; }; int _tmain(int argc, _TCHAR* argv[]) { typedef boost::multi_array<tVoxel, 3> tVolume; tVolume oVolume( boost::extents[3][3][3] ); tVolume::const_iterator iVoxel = oVolume.begin(); tVolume::const_iterator iVoxelEnd = oVolume.end(); const tVoxel& oVoxel = iVoxel->get(); return 0; } The error message goes like: error C2039: 'get' : is not a member of 'boost::detail::multi_array::const_sub_array<T,NumDims>' with [ T=tVoxel, NumDims=2 ] Do I miss something important, here? Thanks for your help, Christian