At < http://www.boost.org/doc/libs/1_58_0/doc/html/property_tree/reference.html#header.boost.property_tree.ptree_hpp> The entry for "Header <boost/property_tree/ptree.hpp>" is blank. It looks like a 1.58 bug. Kind regards, Nevin :-) -- Nevin ":-)" Liber <mailto:nevin@eviloverlord.com> (847) 691-1404