Hello all, I sent the following to the spirit newsgroup, but it did not appear. I thought I'd try here. I am using the following boost version under Visual C++ 7.1: #define BOOST_VERSION 103200 I have the following #include in one of my source files: #include This induces the following compilation error: c:\sts\boost\boost\spirit\iterator\file_iterator.hpp(56) : fatal error C1083: Cannot open include file: 'boost/spirit/core/safe_bool.hpp': No such file or directory How may I remedy this? Also, I am intending to use file_iterator<> objects in conjunction with regex_search. Is there any reason this should not be done? Thanks, Dave