Hi, I make the following call in my application, based on Boost 1.55.0: property_tree::ini_parser::read_ini(IniFile.GetFullPath().ToStdString(), IniTree); This works fine for .ini files up to 64kb, but throws an exception for larger files. Is this a known limitation and, if so, can anybody suggest an alternative that could cope with larger files, please? Best wishes. Tim Burgess