Hello Rune !

Appears that iterator.h differs on different Borland C++ versions. What elese you can do : copy this part of definitions into your old iterator.h , somwhere in the beginning after section: ... #ifndef _RWSTD_NO_NAMESPACE namespace std { #endif

//-------------------------------- struct input_iterator_tag {}; struct output_iterator_tag {}; struct forward_iterator_tag : public input_iterator_tag {}; struct bidirectional_iterator_tag : public forward_iterator_tag {}; struct random_access_iterator_tag : public bidirectional_iterator_tag {};

// The base classes input_iterator, output_iterator, forward_iterator, // bidirectional_iterator, and random_access_iterator are not part of // the C++ standard. (They have been replaced by struct iterator.) // They are included for backward compatibility with the HP STL.

template <class _Tp, class _Distance> struct input_iterator { typedef input_iterator_tag iterator_category; typedef _Tp value_type; typedef _Distance difference_type; typedef _Tp* pointer; typedef _Tp& reference; };

struct output_iterator { typedef output_iterator_tag iterator_category; typedef void value_type; typedef void difference_type; typedef void pointer; typedef void reference; };

template <class _Tp, class _Distance> struct forward_iterator { typedef forward_iterator_tag iterator_category; typedef _Tp value_type; typedef _Distance difference_type; typedef _Tp* pointer; typedef _Tp& reference; };

template <class _Tp, class _Distance> struct bidirectional_iterator { typedef bidirectional_iterator_tag iterator_category; typedef _Tp value_type; typedef _Distance difference_type; typedef _Tp* pointer; typedef _Tp& reference; };

template <class _Tp, class _Distance> struct random_access_iterator { typedef random_access_iterator_tag iterator_category; typedef _Tp value_type; typedef _Distance difference_type; typedef _Tp* pointer; typedef _Tp& reference; }; //-------------------------------------------------------

Good luck !