It appears that the filesystem library and the SparcWorks compiler have some disagreements. I'm running into the same issues as reported on the regression test page here (an example of which is here: http://tinyurl.com/ey5ld). What I'm wondering is if there are any potential patches to Boost to address these problems or if there is some effort to do so. Alternatively, is the SparcWorks compiler just too busted to deal with this library? -Chris