Hi, I've been looking around for potential issues I may have missed but have found none, so I thought I'd ask the list. I am trying to compile the regex library from 1.37.0 using MSVC2005. This used to work for boost 1.36.0, but does not anymore. The extended error set I have pasted here for email brevity: http://pastebin.com/md368403 The start of the errors I'm seeing are: usinstances.cpp C:\boost_libraries\libs\regex\src\usinstances.cpp(47) : error C2910: 'std::char_traits<wchar_t>::length' : cannot be explicitly specialized ... wc_regex_traits.cpp C:\boost_libraries\libs\regex\src\wc_regex_traits.cpp(48) : error C2910: 'std::char_traits<wchar_t>::length' : cannot be explicitly specialized ... ... the really strange thing is, those lines read as follows: template<> BOOST_REGEX_STDLIB_DECL std::size_t __cdecl char_traits<unsigned short>::length(unsigned short const*); ...and... template<> BOOST_REGEX_STDLIB_DECL std::size_t __cdecl char_traits<unsigned short>::length(unsigned short const*); ... respectively, and make no mention of wchar_t. My project settings are as follows: /Od /I "." /I "." /D "DVA_COCOA_UI=0" /D "BOOST_ALL_DYN_LINK" /D "BOOST_ALL_NO_LIB" /D "_WINDOWS" /D "MSWindows" /D "_CRT_SECURE_NO_DEPRECATE" /D "_SCL_SECURE_NO_DEPRECATE" /D "BOOST_THREAD_BUILD_DLL" /D "BOOST_REGEX_USE_CPP_LOCALE" /D "BOOST_NO_WREGEX" /D "BOOST_REGEX_RECURSIVE" /D "BOOST_REGEX_NO_LIB" /D "DEBUG=1" /D "_DEBUG" /D "_WINDLL" /D "_UNICODE" /D "UNICODE" /GF /FD /EHsc /RTC1 /MDd /Zp8 /Gy /Zc:wchar_t- /Fo"..\..\obj\win\debug\64/" /Fd"..\..\lib\win\debug\64/boost_regex.pdb" /W3 /nologo /c /Zi /TP /wd4355 /errorReport:prompt I'm compiling with wchar_t support turned off, and am defining BOOST_NO_WREGEX in an attempt to state as much explicitly for the library. (I couldn't find much documentation about disabling wchar_t support for the regex library explicitly). Does anyone have any pointers to guide me in the direction I should go to get this building again under a 64-bit environment? Thanks in advance for the help, Blessings, Foster -- Foster T. Brereton Adobe Systems Incorporated fbrereto@adobe.com