[boost] [mpi] Error generating documentation.

I'm looking into documentation generation as I try to apply some updates to the boost.python tutorial. Following the steps outlined at http://www.boost.org/doc/html/boostbook.html, I get the error error: Unable to find file or target named error: '../libs/parallel/doc//mpi' error: referred from project at error: '.' Am I the first one to run into this issue ? Note that this error appears to affect all documentation generation, not only boost.mpi. Thanks, Stefan -- ...ich hab' noch einen Koffer in Berlin...