After a longish hiatus from C++ programming, I'm trying to compile a 
simple ARToolkitPlus application with VS .NET but am getting linker 
errors with multiply defined symbols.  The only difference I can see 
between this application and the ARTk+ samples is my use of a header 
file that includes TrackerMultiMarker.h.  Any idea where my error lies?

As always, any help is most appreciated.

Cheers,
Darran.


------ Build started: Project: CommandLine, Configuration: Release Win32 
------

Compiling...
CommandLine.cpp
Linking...
msvcprt.lib(MSVCP71.dll) : error LNK2005: "public: __thiscall 
std::basic_string<char,struct std::char_traits<char>,class 
std::allocator<char> >::basic_string<char,struct 
std::char_traits<char>,class std::allocator<char> >(class 
std::basic_string<char,struct std::char_traits<char>,class 
std::allocator<char> > const &)" 
(??0?$basic_string@D .?$char_traits@D @s ..@@V ?$allocator@D @2 @@s ..@@Q ..@A ....@@Z ) 
already defined in SSAMarkerTracker.obj
msvcprt.lib(MSVCP71.dll) : error LNK2005: "public: __thiscall 
std::basic_string<char,struct std::char_traits<char>,class 
std::allocator<char> >::~basic_string<char,struct 
std::char_traits<char>,class std::allocator<char> >(void)" 
(??1?$basic_string@D .?$char_traits@D @s ..@@V ?$allocator@D @2 @@s ..@@Q ..@X .) 
already defined in SSAMarkerTracker.obj
msvcprt.lib(MSVCP71.dll) : error LNK2005: "public: __thiscall 
std::basic_string<char,struct std::char_traits<char>,class 
std::allocator<char> >::basic_string<char,struct 
std::char_traits<char>,class std::allocator<char> >(char const *)" 
(??0?$basic_string@D .?$char_traits@D @s ..@@V ?$allocator@D @2 @@s ..@@Q ..@P ..@Z ) 
already defined in SSAMarkerTracker.obj
Release/CommandLine.exe : fatal error LNK1169: one or more multiply 
defined symbols found

Build log was saved at ...
CommandLine - 4 error(s), 0 warning(s)

---------------------- Done ----------------------
     Build: 0 succeeded, 1 failed, 0 skipped


-- 
Darran Edmundson [darran@e ............]
Interactive visualization for museums and industry
http://www.edmstudio.com