I am trying to build the Regex library for hp_ux 11.0 using aCC version 3.33. I have tried both the current CVS version and version 1.28 of Boost. With either one, I get the same errors. Below is the full text of my error message. I have been able to build successfully on many other platforms. I found a message in the archives, accessible at http://lists.boost.org/MailArchives/boost/msg29179.php, where another user has experienced a similar problem. Has anyone solved this problem, or could any offer a possible fix? Is anyone using Regex on HP_UX? If so, any tips on configuration, etc, would be greatly appreciated. I am stumped by this one. Thanks in advance for your help, Mark Dufresne Here is the error: aCC -o hp_ux/boost_regex/cregex.o -c -I../../../ +Z -AA -mt +DAportable -g0 +W749 ../src/cregex.cpp Error 619: "../../../boost/regex/detail/regex_match.hpp", line 1781 # The definition of template iterator_traits > contains typename qualification '_Iterator::iterator_category', yet generation of specialization struct iterator_traits > implies that '_Iterator' is 'class allocator_adapter', which does not contain a type named 'iterator_category'. return re_detail::reg_grep(re_detail::grep_search_predicate contains typename qualification '_Iterator::value_type', yet generation of specialization struct iterator_traits implies that '_Iterator' is 'tentative class template#0', which is incomplete. Error 445: "../../../boost/regex/detail/regex_match.hpp", line 1781 # Cannot recover from earlier errors. return re_detail::reg_grep(re_detail::grep_search_predicate