Hi! It seems that Boost.Accumulators is broken for all msvc builds with error messages like: boost/accumulators/framework/accumulators/reference_accumulator.hpp(72) : error C2061: syntax error : identifier 'BOOST_PP_CAT' boost/accumulators/framework/accumulators/reference_accumulator.hpp(72) : fatal error C1903: unable to recover from previous error(s); stopping compilation (from http://www.boost.org/development/tests/develop/developer/output/teeks99-02e-...) The regression page http://www.boost.org/development/tests/develop/developer/accumulators.html shows _all_ msvc builders failing. My own code broke with an identical message sometime last week. Any ideas? Yours, Jürgen -- * Dipl.-Math. Jürgen Hunold ! * voice: ++49 4257 300 ! Fährstraße 1 * fax : ++49 4257 300 ! 31609 Balge/Sebbenhausen * jhunold@gmx.eu ! Germany