Sorry, I guess I wasn't specific enough. VC6 compiler. The warnings are usually like this; c:\program files\microsoft visual studio\vc98\include\xmemory(39) : warning C4100: '_P' : unreferenced formal parameter c:\program files\microsoft visual studio\vc98\include\xmemory(41) : warning C4100: '_P' : unreferenced formal parameter c:\program files\microsoft visual studio\vc98\include\vector(249) : warning C4663: C++ language change: to explicitly specialize class template 'vector' use the following syntax: template<> class vector > ... I'm also getting alot of signed/unsigned mismatches and casting warnings. It's ok though, I just modified the offending files with pragma directive and everything seems to be working fine. Thanks! Brent