1>c:\users\bd\documents\visual studio 2010\projects\testerr\testerr\testerr.cpp(11): error C2679: binary '=' : no operator found which takes a right-hand operand of type 'std::_Tree_const_iterator<_Mytree>' (or there is no acceptable conversion)
1>          with
1>          [
1>              _Mytree=std::_Tree_val<std::_Tset_traits<int,std::less<int>,std::allocator<int>,false>>
1>          ]
1>          c:\program files (x86)\microsoft visual studio 10.0\vc\include\xtree(337): could be 'std::_Tree_const_iterator<_Mytree> &std::_Tree_const_iterator<_Mytree>::operator =(const std::_Tree_const_iterator<_Mytree> &)'
1>          with
1>          [
1>              _Mytree=std::_Tree_val<std::_Tset_traits<double,std::less<double>,std::allocator<double>,false>>
1>          ]
1>          while trying to match the argument list '(std::_Tree_const_iterator<_Mytree>, std::_Tree_const_iterator<_Mytree>)'
1>          with
1>          [
1>              _Mytree=std::_Tree_val<std::_Tset_traits<double,std::less<double>,std::allocator<double>,false>>
1>          ]
1>          and
1>          [
1>              _Mytree=std::_Tree_val<std::_Tset_traits<int,std::less<int>,std::allocator<int>,false>>
1>          ]