First; pre-emptive apologies if this should be sent to boost-users instead of here (or I guess the Mod can nuke it and tell me). I figured I should send it here because it's more of a design issue than a "how do I use this" issue... path::begin() is defined as returning an 'iterator' (not a const_iterator), so I figured I'd be able to write to it. I wrote some code which did something like: fs::path p; /*...*/ for (fs::path::iterator it = p.begin(); it != p.end(); it++) if (*it == "FOO") *it = "BAR"; This errors because operator* on the iterator type returns a const string&. So: was this a deliberate design decision? I don't see anything about this in the design rationale stuff in the docs for Boost.Filesystem. Is there a good reason not to allow people to use the iterator to modify individual path elements? -- Jordan DeLong fracture@allusion.net