[Boost-users] [Xpressive] Problem with more than 49 named captures

Hi all, I am having trouble getting more than 49 named captures to work with boost xpressive 1.49.0. I extended the default mark_tag like so: boost::xpressive::mark_tag s10(10); boost::xpressive::mark_tag s11(11); boost::xpressive::mark_tag s12(12); … boost::xpressive::mark_tag s48(48); boost::xpressive::mark_tag s49(49); together with a regular expression that uses these named captures: (skip rather long expression)… (s49= +(boost::xpressive::set[boost::xpressive::range('0','9')|'-'])) This works as long as I stick to only using up to s49, as soon as I start using s50 the regular expression no longer seems to match. Is there anything obvious I am missing before I start digging deeper? Thanks, Mike