Hello, Some time ago I wrote a Boost version of the exception library I've been using in my own programs for several months now. I just finished a somewhat extensive redesign of the library, partly in responce to the initial feedback I received here after my original posting, and partly as a result of my own experience and several discussions with Peter Dimov. I believe the library is now easier to use and explain, yet achieves the same major design goals of the original interface. Here's a link to the new documentation: http://www.revergestudios.com/boost-exception/boost-exception.htm Click "Download" to get a zip file with the source code, complete with boost-build jamfiles and a test suite. I am very interested in your feedback; please download the code and try it out. I still consider Boost Exception as an experiment, but I think this revision brings me very close to requesting a formal review for addition to Boost. Thanks, Emil