Hi: I am defining the following iterator with boost::bimap: typedef boost::bimap, int, BitSetComp>::left_map::iterator DotsIterator; I get the following error amonst others: error C2903: 'rebind' : symbol is neither a class template nor a function template bimap_core.hpp 408 Should I have included something. If not how do I use boost::bimap with comparison operators within iterators. Note the following won't compile either: typedef boost::bimap, int>::left_map::iterator DotsIterator; Any help apreciated. Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3408 (20080902) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com