<history> <snip/>

...which refers to lexical_cast.hpp

template class lexical_stream { bool operator<<(const Source &input) { here ===> return stream << input; <==== here } } <snip/>

I'm starting to think this may be related to the 1_30_0 lexical cast problem. Can you upgrade lexical_cast.hpp from cvs? You can download it from here: http://cvs.sourceforge.net/cgi- bin/viewcvs.cgi/boost/boost/boost/lexical_cast.hpp Jeff </history> I downloaded the head this (Monday) morning and replaced the 1_30_0 version. Compile error disappeared. (Sanity check: copied the 'old' version back and compile error re-appears.) Thanks for the help. That was driving me nuts.